1Lehman, AF, Goldberg, R, Dixon, LB, McNary, S, Postrado, L, Hackman, A, et al. Improving employment outcomes for persons with severe mental illnesses. Arch Gen Psychiatry 2002; 59: 165–72.
2Luciano, A, Bond, GR, Drake, RE. Does employment alter the course and outcome of schizophrenia and other severe mental illnesses? A systematic review of longitudinal research. Schizophr Res 2014; 159: 312–21.
3Marwaha, S, Johnson, S, Bebbington, P, Stafford, M, Angermeyer, MC, Brugha, T, et al. Rates and correlates of employment in people with schizophrenia in the UK, France and Germany. Br J Psychiatry 2007; 191: 30–7.
4Mueser, KT, Salyers, MP, Mueser, PR. A prospective analysis of work in schizophrenia. Schizophr Bull 2001; 27: 281–96.
5Birchwood, M, Todd, P, Jackson, C. Early intervention in psychosis. The critical period hypothesis. Br J Psychiatry Suppl 1998; 172: 53–9.
6Bertolote, J, McGorry, P. Early intervention and recovery for young people with early psychosis: consensus statement. Br J Psychiatry Suppl 2005; 48: s116–9.
7Correll, CU, Galling, B, Pawar, A, Krivko, A, Bonetto, C, Ruggeri, M, et al. Comparison of early intervention services vs treatment as usual for early-phase psychosis: a systematic review, meta-analysis, and meta-regression. JAMA Psychiatry 2018; 75: 555–65.
8Bertelsen, M, Jeppesen, P, Petersen, L, Thorup, A, Øhlenschlaeger, J, le Quach, P, et al. Five-year follow-up of a randomized multicenter trial of intensive early intervention vs standard treatment for patients with a first episode of psychotic illness: the OPUS trial. Arch Gen Psychiatry 2008; 65: 762–71.
9Secher, RG, Hjorthøj, CR, Austin, SF, Thorup, A, Jeppesen, P, Mors, O, et al. Ten-year follow-up of the OPUS specialized early intervention trial for patients with a first episode of psychosis. Schizophr Bull 2015; 41: 617–26.
10Norman, RMG, Manchanda, R, Malla, AK, Windell, D, Harricharan, R, Northcott, S. Symptom and functional outcomes for a 5 year early intervention program for psychoses. Schizophr Res 2011; 129: 111–5.
11Chan, SKW, Chan, SWY, Pang, HH, Yan, KK, Hui, CLM, Chang, WC, et al. Association of an early intervention service for psychosis with suicide rate among patients with first-episode schizophrenia-spectrum disorders. JAMA Psychiatry 2018; 75: 458–64.
12Chan, SKW, So, HC, Hui, CLM, Chang, WC, Lee, EHM, Chung, DWS, et al. 10-year outcome study of an early intervention program for psychosis compared with standard care service. Psychol Med 2015; 45: 1181–93.
13Singh, SP. Early intervention in psychosis. Br J Psychiatry 2010; 196: 343–5.
14Albert, N, Melau, M, Jensen, H, Emborg, C, Jepsen, JRM, Fagerlund, B, et al. Five years of specialised early intervention versus two years of specialised early intervention followed by three years of standard treatment for patients with a first episode psychosis: randomised, superiority, parallel group trial in Denmark (OPUS II). BMJ 2017; 356: i6681.
15Malla, A, Joober, R, Iyer, S, Norman, R, Schmitz, N, Brown, T, et al. Comparing three-year extension of early intervention service to regular care following two years of early intervention service in first-episode psychosis: a randomized single blind clinical trial. World Psychiatry 2017; 16: 278–86.
16Chang, WC, Chan, GHK, Jim, OTT, Lau, ESK, Hui, CLM, Chan, SKW, et al. Optimal duration of an early intervention programme for first-episode psychosis: randomised controlled trial. Br J Psychiatry 2015; 206: 492–500.
17Velthorst, E, Fett, A-KJ, Reichenberg, A, Perlman, G, van Os, J, Bromet, EJ, et al. The 20-year longitudinal trajectories of social functioning in individuals with psychotic disorders. Am J Psychiatry 2017; 174: 1075–85.
18Marwaha, S, Johnson, S. Schizophrenia and employment - a review. Soc Psychiatry Psychiatr Epidemiol 2004; 39: 337–49.
19Carpenter, WT Jr, Strauss, JS. The prediction of outcome in schizophrenia. IV: eleven-year follow-up of the Washington IPSS cohort. J Nerv Ment Dis 1991; 179: 517–25.
20Racenstein, JM, Harrow, M, Reed, R, Martin, E, Herbener, E, Penn, DL. The relationship between positive symptoms and instrumental work functioning in schizophrenia: a 10 year follow-up study. Schizophr Res 2002; 56: 95–103.
21Tang, JYM, Wong, GHY, Hui, CLM, Lam, MML, Chiu, CPY, Chan, SKW, et al. Early intervention for psychosis in Hong Kong–the EASY programme. Early Interv Psychiatry 2010; 4: 214–9.
22Chan, SKW, Hui, CLM, Chang, WC, Lee, EHM, Chen, EYH. Ten-year follow up of patients with first-episode schizophrenia spectrum disorder from an early intervention service: predictors of clinical remission and functional recovery. Schizophr Res 2019; 204: 65–71.
23Haro, JM, Kamath, SA, Ochoa, S, Novick, D, Rele, K, Fargas, A, et al. The Clinical Global Impression–Schizophrenia scale: a simple instrument to measure the diversity of symptoms present in schizophrenia. Acta Psychiatr Scand 2003; 107: 16–23.
24Haro, JM, Novick, D, Bertsch, J, Karagianis, J, Dossenbach, M, Jones, PB. Cross-national clinical and functional remission rates: Worldwide Schizophrenia Outpatient Health Outcomes (W-SOHO) study. Br J Psychiatry 2011; 199: 194–201.
25Nosè, M, Tansella, M, Thornicroft, G, Schene, A, Becker, T, Veronese, A, et al. Is the Defined Daily Dose system a reliable tool for standardizing antipsychotic dosages? Int Clin Psychopharmacol 2008; 23: 287–90.
26Kay, SR, Fiszbein, A, Opler, LA. The positive and negative syndrome scale (PANSS) for schizophrenia. Schizophr Bull 1987; 13: 261–76.
27Morosini, PL, Magliano, L, Brambilla, L, Ugolini, S, Pioli, R. Development, reliability and acceptability of a new version of the DSM-IV Social and Occupational Functioning Assessment Scale (SOFAS) to assess routine social functioning. Acta Psychiatr Scand 2000; 101: 323–9.
28Goodman, SH, Sewell, DR, Cooley, EL, Leavitt, N. Assessing levels of adaptive functioning: the Role Functioning Scale. Community Ment Health J 1993; 29: 119–31.
29Kaufman, L, Rousseeuw, PJ. Finding Groups in Data. John Wiley & Sons, 1990.
30Yao, XI, Wang, X, Speicher, PJ, Hwang, ES, Cheng, P, Harpole, DH, et al. Reporting and guidelines in propensity score analysis: a systematic review of cancer and cancer surgical studies. J Natl Cancer Inst 2017; 109: djw323.
31Bond, GR, Drake, RE, Luciano, A. Employment and educational outcomes in early intervention programmes for early psychosis: a systematic review. Epidemiol Psychiatr Sci 2015; 24: 446–57.
32Hui, CLM, Honer, WG, Lee, EHM, Chang, WC, Chan, SKW, Chen, ESM, et al. Long-term effects of discontinuation from antipsychotic maintenance following first-episode schizophrenia and related disorders: a 10 year follow-up of a randomised, double-blind trial. Lancet Psychiatry 2018; 5: 432–42.