Table 3. Multivariate analysis.
| Outcome | OR (95% CI) | P-value | Adjusted OR (95% CI) | P-value |
|---|---|---|---|---|
| Cerebral palsy | 2.6 (1.4–5.1) | 0.004 | 2.3 (1.2, 4.7)a | 0.02 |
| MDI <70 | 2.3 (1.3–4.3) | 0.007 | 2.1 (1.0, 4.2)b | 0.04 |
| PDI <70 | 1.7 (1.0–3.0) | 0.06 | 1.5 (0.9, 2.7)a | 0.1 |
| NDI | 3.3 (1.6–7.0) | 0.002 | 3.0 (1.4, 6.6)a | 0.005 |
Odds ratios and 95% confidence intervals for each 10 unit increase in cHRC.
a
OR adjusted for head ultrasound results.
b
OR adjusted for head ultrasound results and chronic lung disease.
Abbreviations: cHRC, cumulative heart rate characteristics index; OR, odds ratio; CI, confidence interval; MDI, Mental Developmental Index; PDI, Psychomotor Developmental Index; NDI, neurodevelopmental impairment.