Table 1 Baseline characteristics of included subjects
Characteristics | high-risk LPIs(n = 19) | low-risk LPIs(n = 20) | Full-term infants(n = 26) | χ2/F | P |
|---|---|---|---|---|---|
Sex-Male n(%) | 13(68.42) | 14(70.00) | 13(50.00) | 1.333 | 0.275 |
Gestational age(w) | 35.10 ± 0.90 | 35.80 ± 1.10 | 39.80 ± 0.70 | 181.640 | 0.001 |
Birth weight(g) | 2238.51 ± 472.20 | 2529.51 ± 358.81 | 3364.21 ± 379.10 | 49.011 | 0.001 |
head circumference(cm) | 32.20 ± 3.02 | 32.62 ± 1.41 | 34.35 ± 0.91 | 8.919 | 0.001 |
Apgar(5 min) | 8.81 ± 0.51 | 8.94 ± 0.32 | 9.32 ± 0.18 | 2.045 | 0.138 |
Test age(d) | 18.82 ± 8.21 | 10.92 ± 9.93 | 12.24 ± 8.15 | 4.787 | 0.012 |