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高风险组和低风险组患儿一般资料的比较
| 项目 | 高风险组(n=77) | 低风险组(n=77) | χ2/Z值 | P值 |
| 性别(男/女, 例) | 42/35 | 49/28 | 1.316 | 0.251 |
| 诊断年龄[M(P25, P75), d] | 1 030 (696, 1 531) | 1 123 (361, 1 713) | -0.034 | 0.973 |
| INSS分期[n(%)] | ||||
| Ⅱb期 | 1(1) | 0(0) | 10.190 | 0.017 |
| Ⅲ期 | 3(4) | 3(4) | ||
| Ⅳ期 | 69(90) | 57(74) | ||
| Ⅳ-S期 | 4(5) | 17(22) | ||
| COG危险分层[n(%)] | ||||
| 高危型 | 69(90) | 58(75) | ||
| 中危型 | 6(8) | 7(9) | 8.173 | 0.017 |
| 低危型 | 2(3) | 12(16) |
