Table 2.
Non adjusted odds ratio (OR), respective 95% confidence interval (CI), and p-value for variables with p < 0.2.
| Variables | Non-asphyxia | Asphyxia | OR | p-value |
|---|---|---|---|---|
| (n = 502) | (n = 15) | [95% CI] | ||
| Clinical | ||||
| Maternal age (years) | 32 (7) | 30 (10) | 0.92 [0.84;1.00] | 0.054 |
| Gestational age (weeks) | 39.1 (2.8) | 39.25 (1.45) | 1.30 [1.00; 1.91] | 0.117 |
| Male fetus | 288 (57%) | 6 (40%) | 0.50 [0.16; 1.39] | 0.189 |
| SisPorto | ||||
| Prolonged decelerations | 41 (8%) | 6 (40%) | 7.50 [2.41;21.85] | <0.001 |
| Accelerations | 4 (8) | 10 (12) | 1.08 [1.01; 1.15] | 0.014 |
| Orange alerts | 171 (34%) | 9 (60%) | 2.90 [1.03; 8.79] | 0.046 |
| Mild decelerations | 6 (7) | 8 (8.5) | 1.09 [1.00; 1.18] | 0.051 |
| Non-linear | ||||
| CR2 | 4.32 (1.46) | 8.78 (1.53) | 9.79 [4.77; 30.54] | <0.001 |
| MSCsum | 1.46 (1.07) | 2.60 (0.98) | 4.55 [2.12; 10.90] | <0.001 |
Characteristics of asphyxia and non-asphyxia groups, expressed in n(%) or median (interquartile range). SisPorto and non-linear variables were obtained from CTGs in the last 60 min before birth. CR2, compression ratio scale 2; MSCsum, sum of compressed file size for all five scales.