Table 2 Effect of different methods of classifying discrepant reports of hypertension on the prevalence and risk factors for hypertensive disorders of pregnancy

Type of agreement included in analysis

MDC Dataset only

ISC Dataset only

Perfect Agreement

Perfect + Imperfect Agreement

Perfect + Imperfect +

Under-reporting

Perfect + Imperfect +

Under-reporting + Conflicting

N = 250173

N = 250173

N = 238412

N = 239989

N = 249358

N = 250173

n (%)

n (%)

n (%)

n (%)

n (%)

n (%)

2558 (1.02)

1398 (0.56)

612 (0.26)

944 (0.39)

1812 (0.73)

2627 (1.05)

aOR (95%CI)

aOR (95%CI)

aOR (95%CI)

aOR (95%CI)

aOR (95%CI)

aOR (95%CI)

0.52 (0.39, 0.70)

0.41 (0.27, 0.64)

0.25 (0.11, 0.57)

0.38 (0.22, 0.66)

0.51 (0.36, 0.73)

0.52 (0.39, 0.69)

0.64 (0.55, 0.75)

0.59 (0.47, 0.73)

0.38 (0.26, 0.56)

0.50 (0.38, 0.66)

0.64 (0.53, 0.77)

0.65 (0.56, 0.76)

1.00 (Referent)

1.00 (Referent)

1.00 (Referent)

1.00 (Referent)

1.00 (Referent)

1.00 (Referent)

1.11 (1.00, 1.23)

1.16 (1.00,1.33)

1.13 (0.91, 1.40)

1.08 (0.91, 1.29)

1.13 (1.00, 1.28)

1.12 (1.01, 1.24)

1.57 (1.40, 1.76)

1.88 (1.61, 2.18)

2.05 (1.64, 2.56)

1.91 (1.59, 2.29)

1.70 (1.49, 1.95)

1.62 (1.45, 1.81)

2.69 (2.29, 3.15)

3.35 (2.73, 4.12)

3.95 (2.94, 5.30)

3.58 (2.80, 4.56)

2.78 (2.30, 3.35)

2.59 (2.20, 3.04)

n (%)

n (%)

n (%)

n (%)

n (%)

n (%)

15972 (6.38)

18771 (7.50)

12225 (5.13)

13488 (5.62)

20970 (8.41)

21785 (8.71)

aOR (95%CI)

aOR (95%CI)

aOR (95%CI)

aOR (95%CI)

aOR (95%CI)

aOR (95%CI)

2.35 (2.09, 2.64)

2.81 (2.53, 3.13)

2.78 (2.45, 3.15)

2.60 (2.30, 2.95)

2.74 (2.46, 3.04)

2.71 (2.44, 3.01)

1.00 (Referent)

1.00 (Referent)

1.00 (Referent)

1.00 (Referent)

1.00 (Referent)

1.00 (Referent)