Characteristic | Total (n = 793) % | Children aged less than 6 months (n = 137) % | Children aged 6 months or more | ||
---|---|---|---|---|---|
Six-month PBF (n = 286) % | Not six-month PBF (n = 370) % | p-value* | |||
Maternal age | Â | Â | Â | Â | 0.270 |
 21–30 | 8.6 | 12.4 | 7.0 | 8.4 |  |
 31–40 | 77.4 | 83.2 | 74.5 | 77.6 |  |
 ≥ 41 | 14.0 | 4.4 | 18.5 | 14.1 |  |
Maternal education | Â | Â | Â | Â | 0.757 |
 Secondary or below | 7.7 | 6.6 | 8.0 | 7.8 |  |
 Post-secondary: diploma / certificate | 8.3 | 13.9 | 8.4 | 6.2 |  |
 Post-secondary: sub-degree course | 1.9 | 0.7 | 2.1 | 2.2 |  |
 Post-secondary: degree course | 82.1 | 78.8 | 81.5 | 83.8 |  |
Maternal employment status | Â | Â | Â | Â | 0.638 |
 Employed (full time) | 57.4 | 36.5 | 59.8 | 63.2 |  |
 Employed (part time) | 9.2 | 4.4 | 10.1 | 10.3 |  |
 Unemployed | 26.5 | 30.7 | 26.9 | 24.6 |  |
 On maternity leave | 6.9 | 28.5 | 3.1 | 1.9 |  |
Monthly total household income (HKD) | Â | Â | Â | Â | 0.645 |
 ≤ 29,999 | 7.8 | 9.8 | 6.8 | 7.8 |  |
 30,000–49,999 | 14.4 | 15.0 | 16.1 | 12.7 |  |
 50,000–69,999 | 19.8 | 23.3 | 16.8 | 20.8 |  |
 70,000–89,999 | 15.5 | 12.0 | 15.8 | 16.6 |  |
 90,000–109,999 | 15.0 | 15.8 | 16.1 | 13.9 |  |
 ≥ 110,000 | 27.6 | 24.1 | 28.3 | 28.3 |  |
Size of residential property (sq. ft.) | Â | Â | Â | Â | 0.091 |
 ≤ 400 | 17.3 | 16.3 | 16.3 | 18.5 |  |
 400–599 | 23.4 | 29.6 | 18.4 | 25.0 |  |
 600–799 | 24.4 | 22.2 | 25.4 | 24.5 |  |
 ≥ 800 | 34.9 | 31.9 | 39.9 | 32.1 |  |
Number of people in the household | Â | Â | Â | Â | 0.008 |
 2 | 0.5 | 1.5 | 0.0 | 0.5 |  |
 3 | 34.6 | 34.6 | 28.3 | 39.6 |  |
 4 | 39.5 | 35.3 | 45.2 | 36.6 |  |
 ≥ 5 | 25.4 | 28.7 | 26.5 | 23.3 |  |
Birth hospital |  |  |  |  | <  0.001 |
 Public hospital | 60.2 | 53.3 | 69.9 | 55.1 |  |
 Private hospital | 39.8 | 46.7 | 30.1 | 44.9 |  |