Article Figures & Tables
Tables
Assessment item Subject group; mean result (and SD) t value p value First-episode subjects*
n = 111Multiepisode subjects*
n = 76Initial assessment Positive symptoms 17.5 (4.5) 13.8 (5.8) 4.98 < 0.001 Negative symptoms 15.2 (6.1) 16.9 (6.3) −1.86 NS Executive function (WCST) Categories 5.2 (1.6) 3.2 (2.3) 6.80 < 0.001 Perseverative errors 14.9 (4.2) 28.0 (20.5) −5.00 < 0.001 Early information processing (SPAN) 47.6 (7.5) 47.6 (7.5) −1.00 NS Visual attention (DS-CPT) 86.4 (10.0) 86.4 (10.0) −0.64 NS Rey complex figure Copy 35.1 (2.2) 33.3 (3.1) 3.80 < 0.001 Recall 21.5 (7.0) 15.5 (7.5) 4.70 < 0.001 Verbal memory (Wechsler memory scale –revised) Immediate 19.5 (19.9) 18.5 (23.1) 0.31 NS Delayed 21.7 (18.9) 16.5 (18.4) 1.87 NS 1-year follow-up Positive symptoms 11.8 (4.5) 13.8 (5.8) −2.67 < 0.01 Negative symptoms 16.1 (6.1) 16.9 (6.3) −0.89 NS Executive function (WCST) Categories 5.5 (1.3) 3.2 (2.3) 8.70 < 0.001 Perseverative errors 12.1 (12.0) 28.0 (20.5) −6.66 < 0.001 Early information processing (SPAN) 48.3 (7.9) 47.6 (7.5) −0.60 NS Visual attention (DS-CPT) 84.8 (13.4) 86.4 (10.0) −0.85 NS Rey complex figure Copy 35.1 (3.0) 33.3 (3.1) 3.90 < 0.001 Recall 21.4 (7.6) 15.5 (7.5) 5.20 < 0.001 Verbal memory (Wechsler memory scale-revised) Immediate 27.8 (22.8) 18.5 (23.1) 2.74 < 0.01 Delayed 30.1 (23.3) 16.5 (18.4) 4.26 < 0.01 Note: SD = standard deviation, NS = nonsignificant, WCST = Wisconsin Card Sorting Test, SPAN = span of apprehension, DS-CPT = degraded stimulus continuous performance test.
↵* First-episode subjects were assessed on entry to the Calgary Early Psychosis Treatment and Prevention Program and 1 year later; multiepisode subjects were assessed just once. The 2 sets of data for first-episode subjects were compared with the single set of data for multiepisode subjects.