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Table 1 Summary statistics of the included trials

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

  1. K = number of trials; sd = standard deviation