Table 1. Character of birthing mothers and their perceptions on CSS.
| Intervention group n(%) | Comparison group n(%) | χ2 | P-value | |
| N = 114 | N = 102 | |||
| Age (mean ±Sd) | 29±4.3 | 27±3.9 | ||
| Education level | 0.21 | P = 0.94 | ||
| Primary school | 5(4.4) | 4(3.9) | ||
| Middle/high school | 42(36.8) | 35(34.3) | ||
| College or higher | 67(58.8) | 63(61.8) | ||
| Driving experience | 3.34 | P = 0.19 | ||
| Less than 1 year | 41(36.0) | 25(24.5) | ||
| 1–5 years | 47(41.2) | 49(48.0) | ||
| More than 6 years | 26(22.8) | 28(27.5) | ||
| Family monthly income | 0.90 | P = 0.64 | ||
| Less than 3000 Yuan | 12(10.5) | 7(6.9) | ||
| 3000–6000 Yuan | 47(41.2) | 44(43.1) | ||
| More than 6000 Yuan | 55(48.2) | 51(50.0) | ||
| Ever heard of or seen CSS | 4.14 | P = 0.25 | ||
| Never heard or seen | 14(12.3) | 14(13.7) | ||
| Heard but not seen | 25(21.9) | 34(33.3) | ||
| Seen it | 65(57.0) | 47(46.6) | ||
| Ever used | 10(8.8) | 7(6.9) | ||
| Where learned about CSS 1 | 5.79 | P = 0.22 | ||
| Internet | 44(38.6) | 37(36.2) | ||
| TV | 43(37.7) | 28(27.4) | ||
| Friends | 33(28.9) | 30(29.4) | ||
| Car store | 11(9.6) | 20(19.6) | ||
| Others | 21(18.4) | 22(21.6) | ||
| Consider installing child safety seats when buy a car | ||||
| Yes | 77(67.5) | 67(65.7) | 0.08 | P = 0.88 |
| No | 37(32.5) | 35(34.3) |
Note: 1. Sum of percentage is over 100 due to multiple choices.
2. P-values are based on chi-square tests.