Median values (ranges) for gestational age, birth weight, postmenstrual age at treatment, weight at treatment, and duration of treatment
| Group A | Group B | Group C | |
|---|---|---|---|
| Gestational age1(weeks) | 25 (24–28) | 26 (25–30) | 25 (23–27) |
| Birth weight2 (g) | 800 (620–990) | 780 (660–1134) | 660 (500–1055) |
| Postmenstrual age at treatment3(weeks) | 35.5 (34–40) | 37 (34–44) | 36 (34–39) |
| Weight at treatment4 (g) | 1390 (1097–1730) | 1616 (1266–2700) | 1445 (1200–1957) |
| Duration of treatment5 (minutes) | 48 (30–65) | 50 (40–70) | 50 (30–65) |
No significant difference between groups. 1p = 0.12, 2p = 0.12, 3p = 0.19, 4p = 0.06, 5p = 0.47, Kruskal–Wallis one way ANOVA.