Results of multiple regression analyses with variability in mean arterial blood pressure as outcome variable
| IQR ΔMAP (mm Hg) | |||
|---|---|---|---|
| B | 95% CI of B | p Value | |
| IQR ΔMAP, Interquartile range of ΔMAP (difference between two consecutive mean arterial blood pressure recordings), used as a measure of blood pressure variability; B, unstandardised regression coefficients; CRIB, clinical risk index for babies. | |||
| *Birth weights were compared with normal values of birth weight for each infant’s gestational age. | |||
| Treatment group | 0.094 | −0.67 to 0.85 | 0.81 |
| Amount of open label morphine | 0.019 | −0.12 to 0.16 | 0.80 |
| Centre | 0.25 | 0.60 to 1.10 | 0.56 |
| CRIB score | 0.068 | −0.076 to 0.21 | 0.35 |
| Sex | −0.094 | −0.88 to 0.69 | 0.81 |
| Use of inotropics | 0.90 | 0.095 to 1.70 | 0.03 |
| Gestational age | 0.0090 | −0.008 to 0.026 | 0.30 |
| Developmental mean birth weight* | 0.033 | −0.32 to 0.25 | 0.82 |