Professor Jaime Delgadillo

All publications

Journal articles

• Hohl CH, Zilcha-Mano S & Delgadillo J (2024) Is the “social hormone” oxytocin relevant to psychotherapy treatment outcomes? A systematic review of observational and experimental studies. Neuroscience & Biobehavioral Reviews, 167, 105935-105935.
• Moriarty AS, Paton LW, Snell KIE, Archer L, Riley RD, Buckman JEJ, Chew Graham CA, Gilbody S, Ali S, Pilling S , Meader N et al (2024) Development and validation of a prognostic model to predict relapse in adults with remitted depression in primary care: secondary analysis of pooled individual participant data from multiple studies. BMJ Mental Health, 27(1), e301226-e301226.
• Zipfel S, Lutz W, Schneider S, Schramm E, Delgadillo J & Giel KE (2024) The Future of Enhanced Psychotherapy: Towards Precision Psychotherapy. Psychotherapy and Psychosomatics, 93(4), 230-236.
• de Jong K, Douglas S, Wolpert M, Delgadillo J, Aas B, Bovendeerd B, Carlier I, Compare A, Edbrooke-Childs J, Janse P , Lutz W et al (2024) Using progress feedback to enhance treatment outcomes: a narrative review. Administration and Policy in Mental Health and Mental Health Services Research. View this article in WRRO
• Deisenhofer A-K, Barkham M, Beierl ET, Schwartz B, Aafjes-van Doorn K, Beevers CG, Berwian IM, Blackwell SE, Bockting CL, Brakemeier E-L , Brown G et al (2024) Implementing precision methods in personalizing psychological therapies: barriers and possible ways forward. Behaviour Research and Therapy, 172. View this article in WRRO
• Gómez Penedo JM, Rubel J, Meglio M, Bornhauser L, Krieger T, Babl A, Muiños R, Roussos A, Delgadillo J, Flückiger C , Berger T et al (2023) Using machine learning algorithms to predict the effects of change processes in psychotherapy: Toward process-level treatment personalization.. Psychotherapy, 60(4), 536-547.
• Kellett S, Bee C, Smithies J, Aadahl V, Simmonds-Buckley M, Power N, Dugen-Williams C, Fallon N & Delgadillo J (2023) Cognitive-behavioural versus cognitive analytic guided self-help for mild-to-moderate anxiety: a pragmatic, randomised patient preference trial - CORRIGENDUM.. Br J Psychiatry, 1.
• Barkham M, De Jong K, Delgadillo J & Lutz W (2023) Routine Outcome Monitoring (ROM) and feedback: research review and recommendations. Psychotherapy Research.
• Delgadillo J, Budimir S, Barkham M, Humer E, Pieh C & Probst T (2023) A Bayesian network analysis of psychosocial risk and protective factors for suicidal ideation. Frontiers in Public Health, 11.
• Brown GP, Delgadillo J & Golino H (2023) Distinguishing the dimensions of the original dysfunctional attitude scale in an archival clinical sample. Cognitive Therapy and Research, 47, 69-83.
• Gonzalez Salas Duhne P, Delgadillo J & Lutz W (2022) Predicting early dropout in online versus face-to-face guided self-help: A machine learning approach. Behaviour Research and Therapy, 159, 104200-104200.
• Driessen E, Cohen ZD, Lorenzo-Luaces L, Hollon SD, Richards DA, Dobson KS, Dimidjian S, Delgadillo J, Vázquez FL, McNamara K , Horan JJ et al (2022) Efficacy and moderators of cognitive therapy versus behavioural activation for adults with depression : study protocol of a systematic review and meta-analysis of individual participant data. BJPsych Open, 8(5).
• Pott SL, Kellett SC, Green S, Daughters S & Delgadillo J (2022) Behavioral activation for depression delivered by drug and alcohol treatment workers : a pilot randomized controlled trial. Journal of Substance Abuse Treatment.
• Fletcher AC & Delgadillo J (2022) Psychotherapists' personality traits and their influence on treatment processes and outcomes: A scoping review.. J Clin Psychol.
• Lutz W, Schwartz B & Delgadillo J (2022) Measurement-Based and Data-Informed Psychological Therapy. Annual Review of Clinical Psychology, 18(1), 71-98.
• Delgadillo J, Ali S, Fleck K, Agnew C, Southgate A, Parkhouse L, Cohen ZD, DeRubeis RJ & Barkham M (2021) Stratified care vs stepped care for depression : a cluster randomized clinical trial. JAMA Psychiatry.
• Firth N, Barkham M, Delgadillo J, Allery K, Woodward J & O’Cathain A (2021) Socioeconomic deprivation and dropout from contemporary psychological intervention for common mental disorders : a systematic review. Administration and Policy in Mental Health and Mental Health Services Research.
• Rayner C, Coleman JRI, Purves KL, Carr E, Cheesman R, Davies MR, Delgadillo J, Hübel C, Krebs G, Peel AJ , Skelton M et al (2021) Sociodemographic factors associated with treatment-seeking and treatment receipt: cross-sectional analysis of UK Biobank participants with lifetime generalised anxiety or major depressive disorder. BJPsych Open, 7(6).
• Hunt VJ & Delgadillo J (2021) Is alcohol use associated with psychological treatment attendance and clinical outcomes?. British Journal of Clinical Psychology.
• Tait J, Edmeade L & Delgadillo J (2021) Are depressed patients’ coping strategies associated with psychotherapy treatment outcomes?. Psychology and Psychotherapy: Theory, Research and Practice.
• Negeri ZF, Levis B, Sun Y, He C, Krishnan A, Wu Y, Bhandari PM, Neupane D, Brehaut E, Benedetti A , Thombs BD et al (2021) Accuracy of the Patient Health Questionnaire-9 for screening to detect major depression : updated systematic review and individual participant data meta-analysis. BMJ, 375(8309).
• Neupane D, Levis B, Bhandari PM, Thombs BD & Benedetti A (2021) Selective cutoff reporting in studies of the accuracy of the Patient Health Questionnaire‐9 and Edinburgh Postnatal Depression Scale: Comparison of results based on published cutoffs versus all cutoffs using individual participant data meta‐analysis. International Journal of Methods in Psychiatric Research, 30(3).
• Banyard H, Behn AJ & Delgadillo J (2021) Personality disorders and their relation to treatment outcomes in cognitive behavioural therapy for depression: a systematic review and meta-analysis. Cognitive Therapy and Research, 45(4), 561-576. View this article in WRRO
• Gaskell C, Askey-Jones R, Groom M & Delgadillo J (2021) Effectiveness of transdiagnostic seminars to support patients with common mental disorders: a multi-service practice research network study. Behavioural and Cognitive Psychotherapy, 49(4), 495-507. View this article in WRRO
• Delgadillo J, McMillan D, Gilbody S, de Jong K, Lucock M, Lutz W, Rubel J, Aguirre E & Ali S (2021) Cost-effectiveness of feedback-informed psychological treatment: evidence from the IAPT-FIT trial. Behaviour Research and Therapy, 142. View this article in WRRO
• Lutz W, Edelbluth S, Deisenhofer A-K, Delgadillo J, Moggia D, Prinz J & Schwartz B (2021) The impact of switching from face-to-face to remote psychological therapy during the COVID-19 pandemic. Psychotherapy and Psychosomatics, 90(4), 285-286.
• Chang PGRY, Delgadillo J & Waller G (2021) Early response to psychological treatment for eating disorders : a systematic review and meta-analysis. Clinical Psychology Review, 86. View this article in WRRO
• Chekroud AM, Bondar J, Delgadillo J, Doherty G, Wasil A, Fokkema M, Cohen Z, Belgrave D, DeRubeis R, Iniesta R , Dwyer D et al (2021) The promise of machine learning in predicting treatment outcomes in psychiatry. World Psychiatry, 20(2), 154-170.
• Simmonds-Buckley M, Catarino A & Delgadillo J (2021) Depression subtypes and their response to cognitive behavioral therapy: A latent transition analysis.. Depress Anxiety.
• Pieh C, Budimir S, Delgadillo J, Barkham M, Fontaine JRJ & Probst T (2021) Mental health during COVID-19 lockdown in the United Kingdom. Psychosomatic Medicine, 83(4), 328-337. View this article in WRRO
• Bone C, Simmonds-Buckley M, Thwaites R, Sandford D, Merzhvynska M, Rubel J, Deisenhofer A-K, Lutz W & Delgadillo J (2021) Dynamic prediction of psychological treatment outcomes: development and validation of a prediction model using routinely collected symptom data. The Lancet Digital Health, 3(4), e231-e240.
• Noble LA, Firth N, Delgadillo J & Kellett S (2021) An investigation of the competencies involved in the facilitation of CBT-based group psychoeducational interventions. Behavioural and Cognitive Psychotherapy. View this article in WRRO
• Merzhvynska M, Simmonds-Buckley M, Delgadillo J & Kellett S (2021) Trajectories of change in the therapeutic alliance during Cognitive Analytic Therapy for depression. Psychology and Psychotherapy: Theory, Research and Practice. View this article in WRRO
• Delgadillo J (2021) Machine learning : a primer for psychotherapy researchers. Psychotherapy Research, 31(1), 1-4.
• Dolan N, Simmonds-Buckley M, Kellett S, Siddell E & Delgadillo J (2021) Effectiveness of stress control large group psychoeducation for anxiety and depression: Systematic review and meta-analysis. British Journal of Clinical Psychology.
• Kellett S, Wakefield S, Simmonds‐Buckley M & Delgadillo J (2020) The costs and benefits of practice‐based evidence : correcting some misunderstandings about the 10‐year meta‐analysis of IAPT studies. British Journal of Clinical Psychology. View this article in WRRO
• Bone C, Delgadillo J & Barkham M (2020) A systematic review and meta-analysis of the good-enough level (GEL) literature. Journal of Counseling Psychology. View this article in WRRO
• Delgadillo J & Lutz W (2020) A development pathway towards precision mental health care. JAMA Psychiatry, 77(9), 889-890.
• Delgadillo J, Rubel J & Barkham M (2020) Towards personalized allocation of patients to therapists. Journal of Consulting and Clinical Psychology, 88(9), 799-808.
• Wakefield S, Kellett S, Simmonds‐Buckley M, Stockton D, Bradbury A & Delgadillo J (2020) Improving Access to Psychological Therapies (IAPT) in the United Kingdom: A systematic review and meta‐analysis of 10‐years of practice‐based evidence. British Journal of Clinical Psychology. View this article in WRRO
• Levis B, Sun Y, He C, Wu Y, Krishnan A, Bhandari PM, Neupane D, Imran M, Brehaut E, Negeri Z , Fischer FH et al (2020) Accuracy of the PHQ-2 alone and in combination with the PHQ-9 for screening to detect major depression. JAMA : the journal of the American Medical Association, 323(22), 2290-2300.
• Probst T, Kleinstäuber M, Lambert MJ, Tritt K, Pieh C, Loew TH, Dahlbender RW & Delgadillo J (2020) Why are some cases not on track? An item analysis of the assessment for signal cases (ASC) during inpatient psychotherapy. Clinical Psychology and Psychotherapy. View this article in WRRO
• Lorimer B, Delgadillo J, Kellett S & Lawrence J (2020) Dynamic prediction and identification of cases at risk of relapse following completion of low-intensity cognitive behavioural therapy. Psychotherapy Research. View this article in WRRO
• Delgadillo J, Branson A, Kellett S, Myles-Hooton P, Hardy G & Shafran R (2020) Therapist personality traits as predictors of psychological treatment outcomes. Psychotherapy Research. View this article in WRRO
• Robinson L, Kellett S & Delgadillo J (2020) Dose-response patterns in low and high intensity cognitive behavioral therapy for common mental health problems. Depression and Anxiety. View this article in WRRO
• McGrath S, Zhao X, Steele R, Thombs BD, Benedetti A, Levis B, Riehm KE, Saadat N, Levis AW, Azar M , Rice DB et al (2020) Estimating the sample mean and standard deviation from commonly reported quantiles in meta-analysis. Statistical Methods in Medical Research. View this article in WRRO
• Delgadillo J, Appleby S, Booth S, Burnett G, Carey A, Edmeade L, Green S, Griffin P, Johnson E, Jones R , Parker P et al (2020) The Leeds Risk Index: Field-test of a stratified psychological treatment selection algorithm. Psychotherapy and Psychosomatics. View this article in WRRO
• Delgadillo J & Gonzalez Salas Duhne P (2020) Targeted prescription of cognitive-behavioral therapy versus person-centered counseling for depression using a machine learning approach. Journal of Consulting and Clinical Psychology, 88(1), 14-24.
• Lorimer B, Delgadillo J, Kellett S & Brown G (2019) Exploring relapse through a network analysis of residual depression and anxiety symptoms after cognitive behavioural therapy : a proof-of-concept study. Psychotherapy Research. View this article in WRRO
• Finegan M, Firth N & Delgadillo J (2019) Adverse impact of neighbourhood socioeconomic deprivation on psychological treatment outcomes : the role of area-level income and crime. Psychotherapy Research. View this article in WRRO
• Beard J & Delgadillo J (2019) Early response to psychological therapy as a predictor of depression and anxiety treatment outcomes: A systematic review and meta-analysis. Depression and Anxiety. View this article in WRRO
• Levis B, Benedetti A & Thombs BD (2019) Accuracy of Patient Health Questionnaire-9 (PHQ-9) for screening to detect major depression: individual participant data meta-analysis. BMJ: British Medical Journal, 365.
• Wojnarowski C, Firth N, Finegan M & Delgadillo J (2019) Predictors of depression relapse and recurrence after cognitive behavioural therapy: a systematic review and meta-analysis. Behavioural and cognitive psychotherapy. View this article in WRRO
• Firth N, Delgadillo J, Kellett S & Lucock M (2019) The influence of socio-demographic similarity and difference on adequate attendance of group psychoeducational cognitive behavioural therapy. Psychotherapy Research. View this article in WRRO
• Robinson L, Delgadillo J & Kellett S (2019) The dose-response effect in routinely delivered psychological therapies: A systematic review. Psychotherapy Research. View this article in WRRO
• Russ TC, Woelbert E, Davis KAS, Hafferty JD, Ibrahim Z, Inkster B, John A, Lee W, Maxwell M, McIntosh AM , Stewart R et al (2019) How data science can advance mental health research. Nature Human Behaviour, 3(1), 24-32.
• Kellett S, Stockton C, Marshall H, Hall J, Jennings C & Delgadillo J (2018) Efficacy of narrative reformulation during cognitive analytic therapy for depression: Randomized dismantling trial. Journal of Affective Disorders, 239, 37-47. View this article in WRRO
• Delgadillo J, de Jong K, Lucock M, Lutz W, Rubel J, Gilbody S, Ali S, Aguirre E, Appleton M, Nevin J , O'Hayon H et al (2018) Feedback-informed treatment versus usual psychological treatment for depression and anxiety: a multisite, open-label, cluster randomised controlled trial. The Lancet Psychiatry, 5(7), 564-572. View this article in WRRO
• Delgadillo J (2018) Worlds apart: Social inequalities and psychological care. Counselling and Psychotherapy Research, 18(2), 111-113. View this article in WRRO
• Delgadillo J, Farnfield A & North A (2018) Social inequalities in the demand, supply and utilisation of psychological treatment. Counselling and Psychotherapy Research, 18(2), 114-121. View this article in WRRO
• Delgadillo J, Saxon D & Barkham M (2018) Associations between therapists' occupational burnout and their patients' depression and anxiety treatment outcomes. Depression and Anxiety. View this article in WRRO
• Levis B, Benedetti A, Riehm KE, Saadat N, Levis AW, Azar M, Rice DB, Chiovitti MJ, Sanchez TA, Cuijpers P , Gilbody S et al (2018) Probability of major depression diagnostic classification using semi-structured versus fully structured diagnostic interviews. The British Journal of Psychiatry. View this article in WRRO
• Finegan M, Firth N, Wojnarowski C & Delgadillo J (2018) Associations between socioeconomic status and psychological therapy outcomes: A systematic review and meta‐analysis. Depression and Anxiety. View this article in WRRO
• Lucock M, Bartys S, Cupac J, Delgadillo J, Denton C, Gaines S, McMillan D, Prestwich A & Stebbings R (2018) Using Implementation Intentions to Prevent Relapse after Psychological Treatment for Depression – the SMArT Intervention. Behavioural and cognitive psychotherapy. View this article in WRRO
• Deisenhofer AK, Delgadillo J, Rubel J, Böhnke JR, Zimmermann D, Schwartz B & Lutz W (2018) Individual treatment selection for patients with posttraumatic stress disorder. Depression and Anxiety. View this article in WRRO
• Delgadillo J, Rhodes L, Moreea O, McMillan D, Gilbody S, Leach C, Lucock M, Lutz W & Ali S (2018) Relapse and Recurrence of Common Mental Health Problems after Low Intensity Cognitive Behavioural Therapy: The WYLOW Longitudinal Cohort Study. Psychotherapy and psychosomatics. View this article in WRRO
• Delgadillo J (2018) Guided self-help in a brave new world. British Journal of Psychiatry, 212(2), 65-66. View this article in WRRO
• Marsden Z, Teahan A, Lovell K, Blore D & Delgadillo J (2018) Patients' experiences of cognitive behavioural therapy and eye movement desensitisation and reprocessing as treatments for obsessive-compulsive disorder. Counselling and Psychotherapy Research. View this article in WRRO
• Delgadillo J, Overend K, Lucock M, Groom M, Kirby N, McMillan D, Gilbody S, Lutz W, Rubel JA & de Jong K (2017) Improving the efficiency of psychological treatment using outcome feedback technology. Behaviour Research and Therapy, 99, 89-97. View this article in WRRO
• Delgadillo J, Huey D, Bennett H & McMillan D (2017) Case complexity as a guide for psychological treatment selection. Journal of Consulting and Clinical Psychology, 85(9), 835-853.
• Marsden Z, Lovell K, Blore D, Ali S & Delgadillo J (2017) A randomized controlled trial comparing EMDR and CBT for obsessive–compulsive disorder. Clinical Psychology and Psychotherapy. View this article in WRRO
• Lucock M, Barkham M, Donohoe G, Kellett S, McMillan D, Mullaney S, Sainty A, Saxon D, Thwaites R & Delgadillo J (2017) The Role of Practice Research Networks (PRN) in the Development and Implementation of Evidence: The Northern Improving Access to Psychological Therapies PRN Case Study. Administration and Policy in Mental Health and Mental Health Services Research. View this article in WRRO
• Ali S, Rhodes L, Moreea O, McMillan D, Gilbody S, Leach C, Lucock M, Lutz W & Delgadillo J (2017) How durable is the effect of low intensity CBT for depression and anxiety? Remission and relapse in a longitudinal cohort study. Behaviour Research and Therapy, 94, 1-8. View this article in WRRO
• Delgadillo J & Groom M (2017) Using Psychoeducation and Role Induction to Improve Completion Rates in Cognitive Behavioural Therapy. Behavioural and Cognitive Psychotherapy, 45(2), 170-184. View this article in WRRO
• Gilbody S, Lewis H, Adamson J, Atherton K, Bailey D, Birtwistle J, Bosanquet K, Clare E, Delgadillo JA, Ekers D , Foster D et al (2017) Effect of Collaborative Care vs Usual Care on Depressive Symptoms in Older Adults With Subthreshold Depression: The CASPER Randomized Clinical Trial. Journal of the American Medical Association, 317(7), 728-737. View this article in WRRO
• Bell C, Waller G, Shafran R & Delgadillo J (2017) Is there an optimal length of psychological treatment for eating disorder pathology?. International Journal of Eating Disorders. View this article in WRRO
• Delgadillo J, Dawson A, Gilbody S & Böhnke JR (2017) The impact of long term medical conditions on the outcomes of psychological therapy for depression and anxiety. British Journal of Psychiatry, 210, 47-53. View this article in WRRO
• Schiefele A-K, Lutz W, Barkham M, Rubel J, Böhnke J, Delgadillo J, Kopta M, Schulte D, Saxon D, Nielsen SL & Lambert MJ (2017) Reliability of Therapist Effects in Practice-Based Psychotherapy Research: A Guide for the Planning of Future Studies. Administration and Policy in Mental Health and Mental Health Services Research, 44(5), 598-613. View this article in WRRO
• Delgadillo J, Asaria M, Ali S & Gilbody S (2016) On poverty, politics and psychology: the socioeconomic gradient of mental healthcare utilisation and outcomes. British Journal of Psychiatry, 209(5), 429-430.
• Delgadillo J, Kellett S, Ali S, McMillan D, Barkham M, Saxon D, Donohoe G, Stonebank H, Mullaney S, Eschoe P , Thwaites R et al (2016) A multi-service practice research network study of large group psychoeducational cognitive behavioural therapy. Behaviour Research and Therapy, 87, 155-161. View this article in WRRO
• Delgadillo J & Kay-Lambkin F (2016) Closing the science-practice gap: Introduction to the special issue on psychological interventions for comorbid addictions and mental health problems. Advances in Dual Diagnosis, 9(2/3). View this article in WRRO
• Delgadillo J, Böhnke JR, Hughes E & Gilbody S (2016) Disentangling psychopathology, substance use and dependence: a factor analysis. BMC Psychiatry(16). View this article in WRRO
• Delgadillo J, Moreea O & Lutz W (2016) Different people respond differently to therapy: A demonstration using patient profiling and risk stratification. Behaviour Research and Therapy, 79, 15-22.
• Delgadillo J, Moreea O, Murphy E, Ali S & Swift JK (2015) Can Low-Cost Strategies Improve Attendance Rates in Brief Psychological Therapy? Double-Blind Randomized Controlled Trial. Journal of Clinical Psychology, 71(12), 1139-1152.
• Gore S, Mendoza J & Delgadillo J (2015) Multiple obstacles to psychological care from the viewpoint of addiction service users. Advances in Dual Diagnosis, 8(3), 129-140.
• Delgadillo J, Gore S, Ali S, Ekers D, Gilbody S, Gilchrist G, McMillan D & Hughes E (2015) Feasibility Randomized Controlled Trial of Cognitive and Behavioral Interventions for Depression Symptoms in Patients Accessing Drug and Alcohol Treatment. Journal of Substance Abuse Treatment, 55, 6-14.
• Delgadillo J, Gellatly J & Stephenson-Bellwood S (2015) Decision Making in Stepped Care: How Do Therapists Decide Whether to Prolong Treatment or Not?. Behavioural and Cognitive Psychotherapy, 43(3), 328-341.
• Böhnke JR, Lutz W & Delgadillo J (2014) Negative affectivity as a transdiagnostic factor in patients with common mental disorders. Journal of Affective Disorders, 166, 270-278.
• Delgadillo J, Moreea O, Outhwaite-Luke H, Dace T, Nicholls B, Ramseyer G & Dale V (2014) Confidence in the face of risk: the Risk Assessment and Management Self-Efficacy Study (RAMSES). Psychiatric Bulletin, 38(2), 58-65. View this article in WRRO
• Delgadillo J, McMillan D, Lucock M, Leach C, Ali S & Gilbody S (2014) Early changes, attrition, and dose-response in low intensity psychological interventions. British Journal of Clinical Psychology, 53(1), 114-130.
• Delgadillo J, McMillan D, Leach C, Lucock M, Gilbody S & Wood N (2014) Benchmarking Routine Psychological Services: A Discussion of Challenges and Methods. Behavioural and Cognitive Psychotherapy, 42(1), 16-30.
• Delgadillo J, Payne S, Gilbody S & Godfrey C (2013) Psychometric properties of the Treatment Outcomes Profile (TOP) psychological health scale. Mental Health and Substance Use, 6(2), 140-149.
• Delgadillo J, Godfrey C, Gilbody S & Payne S (2013) Depression, anxiety and comorbid substance use: association patterns in outpatient addictions treatment. Mental Health and Substance Use, 6(1), 59-75.
• Delgadillo J, Payne S, Gilbody S, Godfrey C, Gore S, Jessop D & Dale V (2012) Brief case finding tools for anxiety disorders: Validation of GAD-7 and GAD-2 in addictions treatment. Drug and Alcohol Dependence, 125(1-2), 37-42.
• Delgadillo J (2012) Depression and anxiety symptoms: measuring reliable change in alcohol and drug users. Advances in Dual Diagnosis, 5(3), 102-114.
• Delgadillo J, Gore S, Jessop D, Payne S, Singleton P & Gilbody S (2012) Acceptability of mental health screening in routine addictions treatment. General Hospital Psychiatry, 34(4), 415-422.
• Delgadillo J, Payne S, Gilbody S, Godfrey C, Gore S, Jessop D & Dale V (2011) How reliable is depression screening in alcohol and drug users? A validation of brief and ultra-brief questionnaires. Journal of Affective Disorders, 134(1-3), 266-271.
• Henderson CE, Woodard GS, Simmonds-Buckley M, Christensen M, Jensen-Doss A, Douglas S & Delgadillo J () Prediction of adolescent psychotherapy outcomes using youth- and caregiver-reported symptoms data. Psychotherapy Research, 1-13.
• Tait J, Kellett S, Saxon D, Deisenhofer A-K, Lutz W, Barkham M & Delgadillo J () Individual treatment selection for patients with post-traumatic stress disorder: External validation of a personalised advantage index. Psychotherapy Research, 1-14.
• Núñez C, Delgadillo J, Barkham M & Behn A () Understanding Symptom Profiles of Depression with the PHQ-9 in a Community Sample Using Network Analysis. European Psychiatry, 1-36.
• Delgadillo J, Nissen-Lie HA, De Jong K, Schröder TA & Barkham M () An examination of therapists’ professional characteristics as moderators of the effect of feedback on psychological treatment outcomes. Psychotherapy Research, 1-11.
• Bowker H, Saxon D & Delgadillo J () First impressions matter: The influence of initial assessments on psychological treatment initiation and subsequent dropout. Psychotherapy Research.
• Fernández-Alvarez J, Molinari G, Kilcullen R, Delgadillo J, Drill R, Errázuriz P, Falkenstrom F, Firth N, O’Shea A, Paz C , Youn SJ et al () The Importance of Conducting Practice-oriented Research with Underserved Populations. Administration and Policy in Mental Health and Mental Health Services Research.
• Lee R, McMillan D, Delgadillo J, Alexander R & Lucock M () Cognitive change before sudden gains in cognitive behavioural therapy for panic disorder. Behavioural and Cognitive Psychotherapy, 1-12.
• Lorimer B, Kellett S, Giesemann J, Lutz W & Delgadillo J () An investigation of treatment return after psychological therapy for depression and anxiety. Behavioural and Cognitive Psychotherapy, 1-14.
• Duffy KEM, Simmonds-Buckley M, Haake R, Delgadillo J & Barkham M () The efficacy of individual humanistic-experiential therapies for the treatment of depression: A systematic review and meta-analysis of randomized controlled trials. Psychotherapy Research, 1-16.
• Kellett S, Bee C, Smithies J, Aadahl V, Simmonds-Buckley M, Power N, Duggan-Williams C, Fallon N & Delgadillo J () Cognitive–behavioural versus cognitive–analytic guided self-help for mild-to-moderate anxiety: a pragmatic, randomised patient preference trial. The British Journal of Psychiatry, 1-8.
• de Lara ALMV, Bhandari PM, Wu Y, Levis B, Thombs B, Benedetti A, Sun Y, He C, Krishnan A, Neupane D , Negeri Z et al () A case study of an individual participant data meta-analysis of diagnostic accuracy showed that prediction regions represented heterogeneity well. Scientific Reports, 13(1).
• Nye A, Delgadillo J & Barkham M () Efficacy of personalized psychological interventions: A systematic review and meta-analysis. Journal of Consulting and Clinical Psychology.
• Laker V, Simmonds-Buckley M, Delgadillo J, Palmer L & Barkham M () Pragmatic randomized controlled trial of the Mind Management Skills for Life Programme as an intervention for occupational burnout in mental healthcare professionals. Journal of Mental Health, 1-9.
• Gaskell C, Kellett S, Simmonds-Buckley M, Curran J, Hetherington J & Delgadillo J () Long-term psychotherapy in tertiary care: A practice-based benchmarking study. British Journal of Clinical Psychology.
• Michael B, Kellett S & Delgadillo J () Is clinical decision-making in stepped-care psychological services influenced by heuristics and biases?. Behavioural and Cognitive Psychotherapy.
• Giesemann J, Delgadillo J, Schwartz B, Bennemann B & Lutz W () Predicting dropout from psychological treatment using different machine learning algorithms, resampling methods, and sample sizes. Psychotherapy Research, 1-13.
• Firth N, Barkham M, Delgadillo J, Bell A & O'Cathain A () The role of socioeconomic deprivation in explaining neighborhood and clinic effects in the effectiveness of psychological interventions. Journal of Consulting and Clinical Psychology.
• Sweetman J, Knapp P, McMillan D, Fairhurst C, Delgadillo J & Hewitt C () Risk factors for initial appointment non-attendance at Improving Access to Psychological Therapy (IAPT) services: A retrospective analysis. Psychotherapy Research, 1-16.
• Gaskell C, Simmonds-Buckley M, Kellett S, Stockton C, Somerville E, Rogerson E & Delgadillo J () The Effectiveness of Psychological Interventions Delivered in Routine Practice: Systematic Review and Meta-analysis. Administration and Policy in Mental Health and Mental Health Services Research.
• Duffy KEM, Simmonds-Buckley M, Saxon D, Delgadillo J & Barkham M () Early response as a prognostic indicator in person-centered experiential therapy for depression.. Journal of Counseling Psychology.
• Delgadillo J, Deisenhofer A-K, Probst T, Shimokawa K, Lambert MJ & Kleinstäuber M () Progress feedback narrows the gap between more and less effective therapists: A therapist effects meta-analysis of clinical trials.. Journal of Consulting and Clinical Psychology, 90(7), 559-567.
• Power N, Noble L, Simmonds-Buckley M, Kellett S, Stockton C, Firth N & Delgadillo J () Associations between treatment adherence-competence-integrity (ACI) and adult psychotherapy outcomes : a systematic review and meta-analysis. Journal of Consulting and Clinical Psychology.
• Bruijniks SJE, van Bronswijk SC, DeRubeis RJ, Delgadillo J, Cuijpers P & Huibers MJH () Individual differences in response to once versus twice weekly sessions of CBT and IPT for depression.. Journal of Consulting and Clinical Psychology, 90(1), 5-17.
• Wakefield S, Delgadillo J, Kellett S, White S & Hepple J () The effectiveness of brief cognitive analytic therapy for anxiety and depression: A quasi‐experimental case—control study. British Journal of Clinical Psychology.
• Lorimer B, Kellett S, Nye A & Delgadillo J () Predictors of relapse and recurrence following cognitive behavioural therapy for anxiety-related disorders: a systematic review. Cognitive Behaviour Therapy, 1-18.
• Kellett S, Bee C, Aadahl V, Headley E & Delgadillo J () A pragmatic patient preference trial of cognitive behavioural versus cognitive analytic guided self-help for anxiety disorders. Behavioural and Cognitive Psychotherapy, 1-8.
• () PRACTICE BASED EVIDENCE AND THE LAW OF VARIABILITY IN PSYCHOLOGICAL TREATMENT. REVISTA ARGENTINA DE CLINICA PSICOLOGICA. View this article in WRRO
• Ali S, Littlewood E, McMillan D, Delgadillo J, Miranda A, Croudace T & Gilbody S () Heterogeneity in Patient-Reported Outcomes following Low-Intensity Mental Health Interventions: A Multilevel Analysis. PLoS ONE, 9(9), e99658-e99658. View this article in WRRO
• Flückiger C, Wampold BE, Delgadillo J, Rubel J, Vîslă A & Lutz W () Is there an evidence-based number of sessions in outpatient psychotherapy? – A comparison of naturalistic conditions across countries. Psychotherapy and Psychosomatics. View this article in WRRO
• Pott S, Delgadillo J & Kellett S () Is Behavioural Activation an effective and acceptable treatment for co-occurring depression and substance use disorders? A meta-analysis of randomised controlled trials. Journal of Substance Abuse Treatment.

Chapters

• Barkham M, Jong KD, Delgadillo, and J & Lutz W (2023) Routine Outcome Monitoring, Psychotherapy Skills and Methods That Work (pp. 429-C15P317). Oxford University PressNew York
• Delgadillo J & Atzil-Slonim D (2023) Artificial intelligence, machine learning and mental health, Encyclopedia of Mental Health, Third Edition: Volume 1-3 (pp. V1-132-V1-142).
• Delgadillo J & Atzil-Slonim D (2022) Artificial intelligence, machine learning and mental health, Reference Module in Neuroscience and Biobehavioral Psychology Elsevier

Conference proceedings papers

• Tyszczuk L, Levita L, Delgadillo J, Haihong Z & Arvaneh M (2023) Predicting Outcomes of Cognitive Behavioral Therapy for Depression Using Data Driven Approaches. 2023 Asia Pacific Signal and Information Processing Association Annual Summit and Conference (APSIPA ASC), 31 October 2023 - 3 November 2023.

Preprints

• Moriarty AS, Paton LW, Snell KIE, Archer L, Riley RD, Buckman JEJ, Chew-Graham CA, Gilbody S, Ali S, Pilling S , Meader N et al (2024) The development and validation of a prognostic model to predict relapse in adults with remitted depression in primary care: secondary analysis of pooled individual participant data from multiple studies, Cold Spring Harbor Laboratory.