Table 2

Construct validity of the SPIN: different severity levels by global ratings at end-point

Total SPIN scores: mean (s.d.)
Group III1 Group IV2
SPIN score n SPIN score n
CGI, Clinical Global Impression scale.
1. Spearman correlation coefficient: r = 0.702.
2. Spearman correlation coefficient: r = 0.689.
CGI-severity
1 Not at all ill 23.0 (0.0) 1 15.1 (8.9) 10
2 Borderline ill 8.2 (6.5) 4 17.8 (4.1) 8
3 Mildly ill 22.7 (10.0) 14 26.3 (9.6) 13
4 Moderately ill 31.4 (12.5) 23 33.9 (9.6) 19
5 Severely ill 39.8 (10.2) 15 40.7 (10.9) 4
6 Very severely ill 50.0 (4.7) 8 54.0 (0.0) 1