Outcome for preterm infants
| Outcome variable | Position | N | Median | IQR | p Value* |
|---|---|---|---|---|---|
| Heart rate (bpm) | At rest in cot | 20 | 151.5 | 145–159 | Ref group |
| 30° | 18 | 153 | 143.8–158.2 | 0.88 | |
| 40° | 20 | 156 | 150.3–158 | 0.20 | |
| In motion | 19 | 157 | 150–163 | 0.21 | |
| Oxygen saturation (%) | At rest in cot | 20 | 96 | 93–97 | Ref group |
| 30° | 18 | 96 | 93.5–97.3 | 0.71 | |
| 40° | 20 | 94.5 | 94–96 | 0.34 | |
| In motion | 19 | 94 | 91–95 | 0.01 | |
| Number of desaturations <85% in 30 min (n) | At rest in cot | 20 | 5 | 0–8 | Ref group |
| 30° | 18 | 3 | 1–8.25 | 0.69 | |
| 40° | 19 | 4 | 2–6 | 0.85 | |
| In motion | 18 | 7.5 | 1.8–14.3 | 0.02 | |
| Total number of desaturations (n) | At rest in cot | 20 | 28 | 22–36 | Ref group |
| 30° | 18 | 33 | 23–41 | 0.21 | |
| 40° | 20 | 34 | 25–37 | 0.07 | |
| In motion | 19 | 38 | 36–51 | 0.001 | |
| Respiratory rate (breaths per minute) | At rest in cot | 20 | 42 | 40–48.8 | Ref group |
| 30° | 18 | 44 | 38–49.3 | 0.42 | |
| 40° | 20 | 48 | 37–53 | 0.02 | |
| In motion | 19 | 45 | 41–48 | 0.45 | |
| End-tidal CO2 (kPa) | At rest in cot | 19 | 4.99 | 4.18–5.5 | Ref group |
| 30° | 18 | 4.67 | 4.05–5.19 | 0.36 | |
| 40° | 20 | 4.71 | 4.23–5.22 | 0.85 | |
| In motion | 19 | 4.79 | 4.60–5.14 | 0.68 | |
| Outcome variable | Position | N | n | Per cent | p Value† |
| One or more bradycardias (n) | At rest in cot | 20 | 1 | 5.0 | Ref group |
| 30° | 18 | 1 | 5.6 | 0.48 | |
| 40° | 20 | 0 | 0 | 1.00 | |
| In motion | 19 | 0 | 0 | 1.00 | |
| One or more apnoeas (n) | At rest in cot | 20 | 3 | 15 | Ref group |
| 30° | 18 | 0 | 0 | 0.25 | |
| 40° | 20 | 2 | 10 | 0.62 | |
| In motion | 19 | 0 | 0 | 1.00 |
*Wilcoxon test. †McNemar's test.