Table 1 Characteristics of working mothers of this study
|  | 2011 (N = 6992) | 2016(N = 7350) | ||
|---|---|---|---|---|
| Â | working mothers | % | working mothers | % |
Maternal age | ||||
 20–24 | 268 | 3.8 | 363 | 4.9 |
 25–29 | 1580 | 22.6 | 1512 | 20.6 |
 30–34 | 3368 | 48.2 | 3363 | 45.8 |
 > 35 | 1776 | 25.4 | 2112 | 28.7 |
Education level | ||||
 lower than secondary | 1541 | 22.0 | 1320 | 18.0 |
 secondary education | 1596 | 22.8 | 879 | 12.0 |
 higher than secondary | 3853 | 55.1 | 5140 | 69.9 |
Parity | ||||
 1 | 3822 | 54.7 | 4037 | 54.9 |
 2 | 2654 | 38.0 | 2747 | 37.4 |
 3 | 456 | 6.5 | 505 | 6.9 |
  ≥ 4 | 57 | 0.8 | 60 | 0.8 |
Income | ||||
 low income | 257 | 3.7 | 179 | 2.4 |
 lower-middle income | 1129 | 16.1 | 1213 | 16.5 |
 upper-middle income | 3618 | 51.7 | 3759 | 51.1 |
 high income | 1290 | 18.5 | 1554 | 21.1 |
Rooming in | ||||
 yes | 248 | 3.5 | 1418 | 19.3 |
 no | 6947 | 96.5 | 5392 | 80.7 |
Early skin to skin | ||||
 yes | 3935 | 56.3 | 2740 | 37.3 |
 no | 2968 | 42.4 | 4481 | 61.0 |
Peer supporters | ||||
 yes | 248 | 3.5 | 4080 | 55.5 |
 no | 6745 | 96.5 | 3270 | 44.5 |
Breastfeeding volunteers | ||||
 yes | 1180 | 16.9 | 3870 | 52.7 |
 no | 5813 | 83.1 | 3479 | 47.3 |
Lactation consultant | ||||
 yes | 994 | 14.2 | 4005 | 54.5 |
 no | 5998 | 85.8 | 3344 | 45.5 |
Using PLR | ||||
 yes | 3425 | 49.0 | 4709 | 64.1 |
 no | 3567 | 51.0 | 2641 | 35.9 |
Using WLR | ||||
 yes | 3050 | 43.7 | 3913 | 53.2 |
 no | 3931 | 53.6 | 3400 | 46.3 |