Table 2.
Basic characteristics between term and preterm infants in high- and low-altitude regions
| High-altitude group (n = 40) | Low-altitude group (n = 40) | p 1 | p 2 | |||
|---|---|---|---|---|---|---|
| Term infants (n = 20) | Preterm infants (n = 20) | Term infants (n = 20) | Preterm infants (n = 20) | |||
| Male, n (%) | 10 (50.00) | 11 (55.00) | 11 (55.00) | 10 (50.00) | 0.752 | 0.752 |
| GAa (w) | 39.43 (38.32, 40.04) | 33.93 (30.86, 35.82) | 38.78 (37.86, 39.34) | 33.34 (31.53, 34.57) | 0.239 | 0.715 |
| BWa (g) | 3125.00 (2500.00, 3420.00) | 1950.00 (1700.00, 2327.50) | 3025.00 (2705.00, 3242.50) | 1900.00 (1575.00, 2270.00) | 0.636 | 0.387 |
| Lengtha (cm) | 49.00 (46.50, 50.25) | 43.50 (42.00, 46.00) | 49.00 (46.00, 49.00) | 42.50 (39.75, 44.00) | 0.318 | 0.053 |
| SpO2a (%) | 91.50 (89.75, 94.25) | 93.00 (92.00, 94.25) | 98.00 (96.00, 100.00) | 99.50 (98.00, 100.00) | <.001* | <.001* |
| HRa (n/min) | 144.50 (136.75, 151.25) | 142.50 (135.00, 149.75) | 134.39 (127.47, 149.36) | 147.82 (138.20, 158.43) | 0.091 | 0.199 |
| HBa (g/L) | 174.50 (153.25, 193.50) | 187.00 (176.25, 199.25) | 178.50 (158.00, 190.75) | 169.00 (156.00, 195.50) | 1.000 | 0.323 |
| OCCa (mL O2/dL) | 23.38 (20.54, 25.93) | 25.06 (23.62, 26.70) | 23.92 (21.17, 25.56) | 22.65 (20.90, 26.20) | 1.000 | 0.323 |
| SBPa (mmHg) | 74.00 (69.00, 78.25) | 64.00 (59.50, 67.25) | 65.50 (59.50, 70.00) | 60.00 (56.75, 64.25) | <.001* | 0.243 |
| DBPa (mmHg) | 43.00 (36.00, 48.25) | 35.50 (30.25, 38.00) | 40.50 (35.00, 44.00) | 36.00 (31.00, 42.00) | 0.171 | 0.432 |
| MAPa (mmHg) | 52.50 (47.75, 58.50) | 43.00 (37.75, 45.50) | 50.17 (43.08, 52.17) | 45.17 (39.42, 47.83) | 0.025* | 0.330 |
p1: comparison between high-altitude versus low-altitude in term neonates; p2: comparison between high-altitude versus low-altitude in preterm neonates
GA gestational age, BW body weight, SpO2 pulse oxygen saturation, HB hemoglobin, HR heart rate, OCC oxygen carrying capacity, SBP systolic blood pressure, DBP diastolic blood pressure, MAP mean blood pressure
aData are presented as n (%), mean ± standard deviation (x ± s), and median (P25, P75)
*p < 0.05 indicates a statistically significant difference