Table 2. Habituated preterm infants’ general and medical characteristics according to the conditions.
| Characteristics | Silence condition (N = 24) | Noise condition (N = 24) | p |
|---|---|---|---|
| n (%) or mean (SD) | n (%) or mean (SD) | ||
| Gender | 0.86 | ||
| Girl | 12 (50) | 10 (41.7) | |
| Boy | 12 (50) | 14 (58.3) | |
| Gestational age (weeks) | 30 + 1 (2.8) | 30 (3.2) | 0.84 |
| Post-natal age (days) | 19.5 (15) | 19.9 (20) | 0.94 |
| Post-conceptional age (weeks) | 33 (1.6) | 32 + 6 (1.6) | 0.84 |
| Birth weight (g) | 1415 (475) | 1288 (483) | 0.37 |
| Weight at test (g) | 1675 (329) | 1541 (309) | 0.15 |
| Antenatal steroids treatment | 23 (95.8) | 21 (87.5) | 0.86 |
| SGA | 4 (16.7) | 7 (29.2) | 0.47 |
| Caesarean delivery | 12 (50) | 15 (62.5) | 0.83 |
| Apgar score <7 at 5 min | 3 (12.5) | 1 (4.2) | 0.06 |
| Apgar score <7 at 10 min | 1 (4.2) | 1 (4.2) | 0.18 |
| Intubation | 11 (45.8) | 7 (29.2) | 0.45 |
| nCPAP during hospitalization | 18 (75) | 18 (75) | 0.74 |
| nCPAP during the test | 4 (16.7) | 9 (37.5) | 0.10 |
| Nasal cannula | 16 (66.7) | 13 (54.2) | 0.86 |
| Central venous catheter | 20 (83.3) | 19 (79.2) | 0.93 |
Note: nCPAP, nasal continuous positive airway pressure; SGA, Small for Gestational Age.