Table 2

Results relating to clinical change and study attrition.


Months
Number of trials
Chlorpromazine
Placebo
RR (95% CI)
Test for heterogeneity




events/total participants



Relapse
6–24
3
108/202
159/192
0.65 (0.5–9.0)
Chi2 7.83, df 2, p = 0.02 I2 = 74.5%*
No global improvement
2–6
13
470/654
406/467
0.76 (0.7–0.9)
Chi2 25.4, df 12, p = 0.01 I2 = 52.8%
Leaving the study early
6–24
2
38/254
33/238
1.09 (0.7–1.6)
Chi2 0.47, df 1, p = 0.49 I2 = 0%

* no clear cause of heterogeneity found on close re-inspection of trials

Adams et al. BMC Medicine 2005 3:15   doi:10.1186/1741-7015-3-15