From: Are the effects of blood pressure lowering treatment diminishing?: meta-regression analyses
 | K | mean (sd) | minimum | maximum |
---|---|---|---|---|
All trials | ||||
 Trial start year (years) | 82 | 1993.0 (10.3) | 1964 | 2010 |
 Sample size (number of participants) | 85 | 4036.8 (4919.6) | 194 | 25,620 |
 Age (years) | 84 | 61.0 (10.0) | 29.7 | 83.8 |
 Baseline SBP (mmHg) | 84 | 148.9 (18.5) | 112.0 | 196.4 |
 SBP difference (mmHg) | 81 | 7.3 (6.2) | −0.1 | 31.4 |
 Region | 11 in Asia, 27 in Europe, 16 in North America, 2 in Oceania, 1 in South America, 28 in mixed regions | |||
Trials on all-cause mortality | ||||
 Trial start year (years) | 79 | 1993.0 (10.4) | 1964 | 2010 |
 Sample size (number of participants) | 82 | 4119.0 (4989.8) | 194 | 25,620 |
 Age (years) | 81 | 61.0 (10.1) | 29.7 | 83.8 |
 Baseline SBP (mmHg) | 81 | 148.6 (18.8) | 112.0 | 196.4 |
 SBP difference (mmHg) | 78 | 7.3 (6.2) | −0.1 | 31.4 |
 Region (mmHg) | 9 in Asia, 26 in Europe, 16 in North America, 2 in Oceania, 1 in South America, 28 in mixed regions | |||
Trials on stroke | ||||
 Trial start year (years) | 71 | 1992.8 (10.3) | 1964 | 2010 |
 Sample size (number of participants) | 74 | 4459.0 (5133.6) | 281 | 25,620 |
 Age (years) | 73 | 62.6 (8.7) | 29.7 | 83.8 |
 Baseline SBP (mmHg) | 74 | 150.9 (18.1) | 112.0 | 196.4 |
 SBP difference (mmHg) | 71 | 7.9 (6.3) | −0.1 | 31.4 |
 Region | 11 in Asia, 22 in Europe, 15 in North America, 2 in Oceania, 24 in mixed regions |