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. 2013 Jul 29;8(7):e70111. doi: 10.1371/journal.pone.0070111

Table 1. Characteristics of studies included in the meta-analysis.

Author Publication date Methods Participants Interventions Assessment ofoutcome Duration Drop out Risk of bias
Brown MJ[17] 2011 Multicenter double-blind, randomised, parallel-group, superiority trial 1247 participants, 315 patients were randomlyassigned to amlodipine 10 mg, 315 patientswere randomly assigned to aliskiren300 mg, and 617 to aliskiren/amlodipine300/10 mg, aged>18 years. Combination therapy:aliskiren/amlodipine 150 mg/5 mg, 300 mg/10 mg, once daily. Monotherapy: amlodipine 5 mg, or 10 mg, oncedaily. Aliskiren 150 mg, or 300 mg,once daily. BP reduction, rate of adverse events in total participants, laboratory evaluations. 8 weeks 188 Low risk
Weinberger MH[14] 2011 Prospective, multicenter, randomized, double-blind, parallel-group 443 participants, 223 patients were randomlyassigned to amlodipine, and 220 to aliskirenplus amlodipine, aged>18 years. Combination therapy: aliskiren/amlodipine 300 mg/10 mg, oncedaily. Monotherapy: amlodipine10 mg, once daily. BP reduction, rate of adverse events in total participants. 8 weeks 33 Moderate risk
Pfeiffer D[18] 2012 Multicenter, randomized, double-blind, parallel-group 847 participants, 283 patients were randomlyassigned to amlodipine, and 279 to aliskiren/amlodipine 300/10 mg, 285 to aliskiren/amlodipine 150/10 mg, aged>18 years. Combination therapy: aliskiren/amlodipine 300 mg/10 mg,150/10 mg once daily. Monotherapy:amlodipine 10 mg once daily. BP reduction, rate of adverse events in total participants, laboratory evaluations. 8 weeks 61 Low risk
Drummond W[13] 2007 Multicenter, randomized, double-blind, active-controlled, parallel-group study 545 participants, 180 patients were randomlyassigned to amlodipine 5 mg, 178 patientswere randomly assigned to amlodipine10 mg, and 187 to aliskiren plus amlodipine,aged>18 years. Combination therapy:aliskiren/amlodipine 150 mg/5 mg, oncedaily. Monotherapy: amlodipine5 mg, or 10 mg, once daily. BP reduction, rate of adverse events in total participants. 6 weeks 22 Moderate risk
Glorioso N[16] 2012 Multicenter, randomized, double-blind, parallel-group multicenter study 820 participants, 260 patients were randomlyassigned to aliskiren 300 mg, 277 patients wererandomly assigned to aliskiren/amlodipine300/5 mg, and 283 to aliskiren/amlodipine300/10 mg, aged>18 years. Combination therapy:aliskiren/amlodipine 300 mg/5 mg,300/10 mg, once daily. Monotherapy:aliskiren 10 mg, once daily. BP reduction, rate of adverse events in total participants, laboratory evaluations. 8 weeks 41 Low risk
Braun-DullaeusRC [15] 2012 Multicentre, randomized, double-blind study 485 participants, 241 patients were randomlyassigned to amlodipine 10 mg, and 244 toaliskiren/amlodipine 300/10 mg,aged>18 years. Combination therapy: aliskiren/amlodipine 300 mg/10 mg, oncedaily. Monotherapy: amlodipine10 mg, once daily. BP reduction, rate of adverse events in total participants, laboratory evaluations. 7 weeks 52 Moderate risk
LittlejohnTW[19] 2012 Multicentre, randomized, double-blind, placebo-controlled 1687 participants, 198 participants wererandomly assigned to placebo; 195 participants wererandomly assigned to aliskiren 150 mg, 203participants to aliskiren 300 mg; 185 participantswere randomly assigned to amlodipine 5 mgand 181 to amlodipine 10 mg; 181 participantswere randomly assigned to aliskiren/amlodipine150/5 mg, 183 participants to aliskiren/amlodipine150/10 mg, 178 participants to aliskiren/amlodipine300/5 mg, and 183 participants to aliskiren/amlodipine300/10 mg, aged>18 years. Combination therapy: aliskiren/amlodipine 300/5 mg, 300/10 mg,150/5 mg, 150/10 mg once daily.Monotherapy: amlodipine 5 mg,10 mg; aliskiren 150 mg,300 mg once daily. BP reduction, rate of adverse events in total participants, laboratory evaluations. 8 weeks 149 Low risk