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. 2008 Oct 8;2008(4):CD003822. doi: 10.1002/14651858.CD003822.pub2

Pool 1998 (study 1).

Methods 4‐ to 5‐week placebo run‐in; inclusion criteria= mean sitting DBP 95‐110 mm Hg on days 22 and 29 (± 3 days) and, if necessary, day 36 (± 3 days) of run‐in; the two measurements could not differ by > 8 mm Hg; 8‐week double‐blind treatment
Participants All patients: n=570(382 males,188 females); mean age=54.2(10.3) years; baseline sitting SBP=152.9(14.4) mm Hg, DBP=101.0(4.3) mm Hg
Interventions Irbesartan 50 mg once daily; 
 Irbesartan 100 mg once daily; 
 Placebo; 
 taken in the morning
Outcomes Mean change from baseline in trough sitting SBP/DBP using mercury sphygmomanometer; 
 Mean change from baseline in peak sitting SBP/DBP using mercury sphygmomanometer; 
 WDAE
Notes BP change and SE of change reported, endpoint BP and SD not reported, baseline SD reported; calculated SD from N and SE; BP data from Table 2, p. 465; Jadad score=4; funding source= Bristol‐Myers Squibb
Risk of bias
Bias Authors' judgement Support for judgement
Allocation concealment? Unclear risk B ‐ Unclear