| Known | 729 | 1.993 (1.633, 2.434)** | 4.484 (3.659, 5.495)** |
| Unknown | 2827 | Ref | Ref |
| Concern on legislation of car seat |
|
|
|
| Concern | 2373 | 0.915 (0.780, 1.074) | 1.400 (1.206, 1.625)** |
| Not concern | 1183 | Ref | Ref |
| Understanding about recall of defective car seat |
|
|
|
| Known | 705 | 0.995 (0.824, 1.202) | 1.279 (1.065, 1.536)** |
| Unknown | 2851 | Ref | Ref |