Table 2 Risk ratio and 95% Confidence Intervals (CI) for hypertension among female and male in different categorizes of age and parity

Aged18-30y

Ref: no-child

Ref: no-child

Ref: no-child

Ref: no-child

 1 child

1.20(0.96, 1.50)

0.09

1.16(0.94, 1.44)

0.15

1.28(0.67, 2.45)

0.44

1.33(0.67, 2.63)

0.40

 2 children

1.17(0.94, 1.46)

0.15

1.14(0.92, 1.41)

0.21

1.29(0.68, 2.42)

0.42

1.31(0.67, 2.54)

0.42

  ≥ 3 childeren

1.20(0.96, 1.49)

0.09

1.16(0.94, 1.43)

0.14

1.37(0.73, 2.56)

0.31

1.42(0.73, 2.74)

0.29

Aged:30-40y

Ref: no-child

Ref: no-child

Ref: no-child

Ref: no-child

 1 child

0.99(0.87, 1.12)

0.88

0.99(0.87, 1.12)

0.92

1.16(1.00, 1.36)

0.04

1.14(0.97, 1.34)

0.09

 2 children

1.11(1.01, 1.23)

0.03

1.10(0.99, 1.22)

0.05

1.11(0.99, 1.25)

0.06

1.17(1.02, 1.35)

0.02

  ≥ 3 childeren

1.01(0.88, 1.14)

0.92

1.00(0.87, 1.14)

0.97

0.88(0.77, 0.99)

0.04

0.87(0.78, 0.99)

0.03

Aged:40-50y

Ref: no-child

Ref: no-child

Ref: no-child

Ref: no-child

 1 child

1.14(1.03, 1.25)

0.006

1.14(1.04, 1.26)

0.004

0.99(.92, 1.06)

0.88

0.99(.92, 1.07)

0.92

 2 children

1.06(1.02, 1.10)

0.002

1.05(1.01, 1.10)

0.005

1.06(1.01, 1.10)

0.006

1.06(1.02, 1.11)

0.004

  ≥ 3 childeren

1.13(1.08, 1.19)

 < 0.001

1.12(1.07, 1.17)

 < 0.001

1.13(1.07, 1.20)

 < 0.001

1.11(1.04, 1.17)

 < 0.001

Aged:50-60y

Ref: no-child

Ref: no-child

Ref: no-child

Ref: no-child

 1 child

1.06 (0.99, 1.14)

0.07

1.06(0.98, 1.14)

0.11

1.12(1.05, 1.19)

 < 0.001

1.11(1.05, 1.18)

 < 0.001

 2 children

1.04(1.01, 1.09)

0.01

1.04(1.01, 1.09)

0.01

1.03(1.01, 1.06)

0.01

1.03(1.00, 1.05)

0.02

  ≥ 3 childeren

1.04(1.02, 1.06)

 < 0.001

1.04(1.02, 1.06)

 < 0.001

1.02(1.00, 1.05)

0.03

1.04(1.01, 1.06)

0.001

Aged60-70y

Ref: no-child

Ref: no-child

Ref: no-child

Ref: no-child

 1 child

1.05(0.97, 1.14)

0.22

1.06(0.95, 1.20)

0.25

0.92(0.82, 1.035)

0.17

0.95(0.85, 1.07)

0.47

 2 children

1.00(0.92, 1.08)

0.95

1.00(0.91, 1.09)

0.98

1.03(.99, 1.06)

0.05

1.04(1.01, 1.08)

0.007

  ≥ 3 childeren

1.03(1.01, 1.05)

0.001

1.02(1.00, 1.04)

0.01

1.03(1.01, 1.04)

0.001

1.03(1.01, 1.04)

0.002