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Table 1 Baseline demographics

From: Clinical and cost-effectiveness of contingency management for cannabis use in early psychosis: the CIRCLE randomised clinical trial

Characteristic Control Contingency Management (CM)
n/N or median or utility score %, SD, or IQR n/N or median or utility score %, SD, or IQR
Male 240/273 88 238/278 86
Age mean (SD) 25 (4) 24 (4)
Ethnicity
 White 144/273 53 148/277 53
 Black 62/273 23 65/277 23
 Asian 30/273 11 29/277 10
 Other 37/273 14 35/277 13
Marital status
 Single 253/273 93 259/278 93
 Married or cohabiting 14/273 5 17/278 6
 Other 6/273 2 2/278 1
Educational attainment
 No qualifications 48/273 18 43/277 16
 GCSE or equivalent 104/273 38 133/277 48
 A level or equivalent 67/273 25 58/277 21
 Post 18 education (including HND, trade, degree) 54/273 20 43/277 16
 Ever had open market employment 223/273 82 240/278 86
 Any current work or study 67/273 25 73/278 26
Diagnosis
 Schizophrenia or schizo-affective disorder 80/256 31 90/268 34
 Bipolar affective disorder 26/256 10 19/268 7
 Depression with psychotic symptoms 11/256 4 5/268 2
 Other psychosis 139/256 54 154/268 57
Cannabis use
 1–3 times a week 77/273 28 78/278 28
 More than 3 times a week 196/273 72 200/278 72
 Any work or study 58/183 32 58/189 31
 Cannabis-positive urine 210/262 80 214/272 79
 Number of days using cannabis* 108 (67, 156) 114 (70, 162)
 History of cannabis dependence 238/273 87 236/278 85
 Current cannabis dependence 183/238 77 185/236 78
 PANSS positive symptoms median (IQR) 12 (9, 17) 13 (9, 16)
 PANSS negative symptoms median (IQR) 14 (11, 19) 14 (10, 19)
EQ-5D-3L utility score 0.7619   0.7652  
SF-6D utility score 0.6789   0.6833