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. 2008 Oct 8;2008(4):CD003823. doi: 10.1002/14651858.CD003823.pub2

Simon 1983.

Methods 4‐week placebo run‐in; inclusion criteria= not reported but baseline DBP for all groups is at least 90 mm Hg; 12‐week total double‐blind treatment; increasing doses of enalapril 10, 20, and 40 mg daily every 4 weeks
Participants All patients: n= 34(33 male,1 female) white patients; 
 Enalapril once and twice daily: n=21; mean age=52(11) years; baseline SBP=143(15) mm Hg, DBP=93(5) mm Hg; 
 Placebo: n=12; mean age=50(17) years; baseline SBP=150(14) mm Hg, DBP=92(7) mm Hg
Interventions Enalapril 10 mg once daily; 
 Enalapril 10 mg twice daily; 
 Placebo; 
 first dose taken in the morning
Outcomes Trough sitting SBP/DBP
Notes Used week 4 DBP only since patients treated with enalapril 10 mg once daily did not have SBP >/= 140mm Hg at baseline; BP change and SD of change not reported; endpoint BP reported; endpoint SD not reported; imputed overall trial mean SD of change; BP data from Figure 1, p. 461; BP measurement device not reported; Jadad score=2; funding source= not reported
Risk of bias
Bias Authors' judgement Support for judgement
Allocation concealment? Unclear risk B ‐ Unclear