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Table 3 Determinants of overweight among women of childbearing age in South Africa

From: Overweight and obesity in non-pregnant women of childbearing age in South Africa: subgroup regression analyses of survey data from 1998 to 2017

 

Survey year

AOR (95% CI)

Determinants

1998

2008

2010/2011

2012

2014/2015

2016

2017

Age

 15–24

1

1

1

1

1

1

1

 25–34

3.11***

2.54***

2.83***

3.19***

3.08***

2.99***

3.51***

(2.60–3.72)

(2.02–3.18)

(2.27–3.54)

(2.67–3.82)

(2.59–3.65)

(2.39–3.73)

(3.00–4.11)

 35–49

6.60***

5.35***

5.24***

6.64***

5.65***

5.98***

5.28***

(5.39–8.09)

(4.32–6.63)

(4.14–6.63)

(5.44–8.11)

(4.72–6.75)

(4.54–7.87)

(4.52–6.17)

Population group

 Non-Black African

1

1

1

1

1

1

1

 Black African

1.69***

1.04

1.39

1.34

1.25

1.42*

1.12

(1.35–2.11)

(0.73–1.48)

(0.95–2.04)

(0.98–1.83)

(0.94–1.67)

(1.01–2.00)

(0.89–1.41)

Education

 No schooling/Primary

1

1

1

1

1

1

1

 Secondary

0.97

1.30*

1.43**

1.78***

1.36**

1.25

1.30*

(0.82–1.15)

(1.05–1.62)

(1.14–1.79)

(1.36–2.32)

(1.11–1.66)

(0.91–1.72)

(1.03–1.64)

 Tertiary

0.56***

1.33

1.39

1.71**

1.70***

1.10

1.28

(0.41–0.76)

(0.93–1.88)

(0.99–1.96)

(1.21–2.42)

(1.24–2.33)

(0.70–1.73)

(0.95–1.73)

Area of residence

 Rural

1

1

1

1

1

1

1

 urban

1.25*

1.15

1.16

1.10

0.92

0.92

0.98

(1.02–1.53)

(0.90–1.45)

(0.92–1.47)

(0.91–1.34)

(0.76–1.11)

(0.73–1.16)

(0.81–1.19)

 Current smoking status

0.61***

0.63**

0.81

0.86

0.73

0.92

0.62**

(0.48–0.79)

(0.45–0.88)

(0.48–1.39)

(0.49–1.52)

(0.50–1.07)

(0.60–1.42)

(0.47–0.84)

Socioeconomic quintiles

 1 (poorest)

1

1

1

1

1

1

1

 2 (poor)

1.12

1.07

1.47**

1.24

1.16

1.32

1.19

(0.84–1.49)

(0.82–1.39)

(1.13–1.91)

(0.99–1.55)

(0.93–1.44)

(0.99–1.77)

(0.98–1.43)

 3 (middle)

1.15

1.16

1.35

0.96

1.54***

1.59**

1.30*

(0.87–1.53)

(0.87–1.54)

(0.99–1.83)

(0.74–1.24)

(1.24–1.91)

(1.18–2.13)

(1.03–1.63)

 4 (rich)

1.27

1.36

1.26

1.32

1.65***

1.56*

1.66***

(0.92–1.75)

(0.99–1.87)

(0.91–1.75)

(0.99–1.76)

(1.26–2.18)

(1.09–2.22)

(1.30–2.12)

 5 (richest)

1.35

1.24

1.38

1.40

1.39*

1.62*

1.39*

(0.95–1.94)

(0.79–1.96)

(0.92–2.07)

(0.98–2.02)

(1.00–1.92)

(1.06–2.46)

(1.04–1.87)

 Constant

0.21***

0.35***

0.25***

0.21***

0.29***

0.30***

0.34***

(0.15–0.30)

(0.22–0.54)

(0.15–0.41)

(0.14–0.33)

(0.20–0.43)

(0.19–0.50)

(0.24–0.48)

 Observations

4993

5785

6286

7594

9034

3262

9342

  1. AOR Adjusted odds ratio, 95% CI 95% confidence intervals in parentheses
  2. *** p < 0.001, ** p < 0.01, * p < 0.05