Table 2 Demographic characteristics of admitted preterm infants in the study groups (n = 80)
Group | Intervention (n = 40) | Control (n = 40) | P-value | ||
|---|---|---|---|---|---|
Demographic characteristics | Number | Percent | Number | Percent | |
Birth weight (g)* |  |  |  |  | P = 0.278* Z = 0.687 |
 ≤ 2200 | 16 | 40 | 11 | 27.5 |  |
 > 2200 | 24 | 60 | 29 | 72.5 |  |
Mean ± SD | 2308.38 ± 507.90 | 2375.50 ± 625.49 |  |  |  |
Current weight (g)* |  |  |  |  | P = 0.230* Z = 0.675 |
 ≤ 2200 | 17 | 42.5 | 11 | 27.5 |  |
 > 2200 | 23 | 57.5 | 29 | 72.5 |  |
Mean ± SD | 2299.12 ± 508.69 | 2388.87 ± 640.36 |  |  |  |
Duration of hospitalization * |  |  |  |  | P = 0.440* Z = 0.721 |
 ≤ 5 | 30 | 75 | 31 | 77.5 |  |
 > 5 | 10 | 25 | 9 | 22.5 |  |
Mean ± SD | 4.53 ± 3.47 | 4.85 ± 3.47 |  |  |  |
Being under Mechanical ventilation** |  |  |  |  | P = 0.785** χ2 = 0.075 |
 Yes | 8 | 20 | 9 | 22.5 |  |
 No | 32 | 80 | 31 | 77.5 |  |