Table 2 Subgroup analysis of the pooled prevalence of suboptimal BP control among the diabetic population in sub-Saharan African countries, 2020 (n = 21)

BP cut point used

130/80

7

2,525

77.7% (66.92, 88.39)

97.5%, < 0.001

140/80

3

995

55.3% (43.92, 66.71)

92.4%, < 0.001

140/90

11

2788

68.8% (60.21, 77.47)

97.3%, < 0.001

Type of DM

Type 2 DM

11

3,754

68.8% (59.49, 78.02)

97.3%, < 0.001

Both types 1 and 2

10

2554

71% (61.83, 80.24)

96.9%, < 0.001

Sample size

 ≤ 296

12

2432

69.7% (60.74, 70.61)

96.6%, < 0.001

 > 296

9

3876

70.0% (60.19, 79.88)

98.1%, < 0.001

Publication year

1997–2004

2

415

75.2% (48.68, 101.7)

97.7%, < 0.001

2005–2012

4

930

82.3% (74.04, 90.01)

90.8%, < 0.001

2013–2020

15

4,963

66.0% (58.59, 73.44)

97.2%, < 0.001

Income level

Low income

11

3271

71.1% (64.35, 77.82)

95.3%, < 0.001

Lower middle income

4

895

77.3% (61.81, 92.77)

97.7%, < 0.001

Upper middle income

6

2142

62.7 (52.15, 73.32)

96.3%, < 0.001