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. 2014 May 29;2014(5):CD003824. doi: 10.1002/14651858.CD003824.pub2
Hydrochlorothiazide dose
mg/day
This review
Monotherapy versus placebo
Chen 2009 review
Second‐line drug versus placebo
Weighted combined
systolic blood pressure‐lowering effect
from both reviews
  RCTs # of patients MD (95% CI) mmHg RCTs # of patients MD (95% CI) mmHg mmHg
3.0 to 6.25 8 663 ‐3.6 (‐5.6 to ‐1.5) 22 3283 ‐3.7 (‐4.6 to ‐2.8) 3.7
12.5 22 2645  ‐6.3 (‐7.2 to ‐5.3) 53 8482 ‐6.0 (‐6.5 to ‐5.4) 6.1
25 25 3062 ‐8.0 (‐9.0 to ‐7.0)  39 5799 ‐8.0 (‐8.7 to ‐7.3) 8.0
50 2 169 ‐10.5 (‐14.6 to ‐6.4) 3 189 ‐17.8 (‐21.6 to ‐14.0) 14.4
100 2 146 ‐9.9 (‐14.1 to ‐5.8)     No data 9.9