| |
1997 (n = 3224)a
|
2003 (n = 5411) a
|
2011 (n = 6256) a
|
P value 11
st
vs 2
nd
period
|
P value 2 2
nd
vs 3
rd
period
|
|---|
|
Age
| | | | | |
|
14–19
|
1.9
|
3.0
|
5.6
|
0.20
|
<0.01
|
|
20–25
|
2.9
|
1.7
|
4.4
|
<0.05
|
<0.01
|
|
26–29
|
3.5
|
1.7
|
4.7
|
<0.05
|
<0.01
|
|
30+
|
1.6
|
2.1
|
4.6
|
0.41
|
<0.01
|
|
P value 3
|
0.07
|
0.09
|
0.46
| | |
|
Education
| | | | | |
|
No education
|
1.4
|
0.8
|
2.2
|
0.10
|
<0.01
|
|
Primary
|
3.1
|
2.3
|
4.2
|
0.12
|
<0.01
|
|
Secondary +
|
5.1
|
8.3
|
11.8
|
0.26
|
0.09
|
|
P value 3
|
<0.01
|
<0.01
|
<0.01
| | |
|
Parity
| | | | | |
|
1
|
3.6
|
3.8
|
7.8
|
0.78
|
<0.01
|
|
2–3
|
2.2
|
2.0
|
4.2
|
0.76
|
<0.01
|
|
4+
|
2.1
|
1.2
|
3.6
|
<0.05
|
<0.01
|
|
P value 3
|
0.09
|
<0.01
|
<0.01
| | |
|
Wealth quintile
| | | | | |
|
Poorest
|
--
|
0.2
|
1.7
|
--
|
<0.01
|
|
Poor
|
--
|
0.3
|
2.3
|
--
|
<0.01
|
|
Middle
|
--
|
0.7
|
2.7
|
--
|
<0.01
|
|
Richer
|
--
|
2.1
|
4.1
|
--
|
<0.01
|
|
Richest
|
--
|
7.2
|
12.3
|
--
|
<0.01
|
|
P value 3
|
--
|
<0.01
|
<0.01
| | |
- aInformation on “whether a woman had or did not have C-section” was missing for 31 women in the 1997 survey and 3 women in 2003
