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

Guitard 1997.

Methods 4‐week placebo washout; inclusion criteria= mean DBP >/= 100 mm Hg at end of washout period and mean DBP 100‐115 mm Hg 24 hours after capsule intake during placebo phase; 8‐week double‐blind treatment, titrated to response at 4 weeks
Participants Enalapril 5 mg: n=101(54 males,47 females); mean age=56.2(9.7) years; baseline SBP=163.2(16.4) mm Hg, DBP=99.5(6.1) mm Hg; 
 Spirapril 6 mg: n=101(50 males,50 females); mean age=58.0(7.9) years; baseline SBP=161.8(16.3) mm Hg, DBP=99.7(6.6) mm Hg; 
 Placebo: n=50(32 males,18 females); mean age=56.5(8.2) years; baseline SBP=161.3(18.2) mm Hg, DBP=98.2(6.9) mm Hg
Interventions Enalapril 5 mg once daily; 
 Spirapril 6 mg once daily; 
 Placebo
Outcomes Adjusted mean change from baseline in trough sitting DBP; 
 Adjusted mean change from baseline in peak sitting DBP
Notes Used week 4 BP data only; BP change reported, SD of change not reported, endpoint BP reported, endpoint SD not reported; imputed overall trial mean DBP SD of change; DBP data from Table 5, p. 455; BP measurement device not reported; Jadad score=2; funding source= Novartis
Risk of bias
Bias Authors' judgement Support for judgement
Allocation concealment? Unclear risk B ‐ Unclear