Table 4.
Multivariate analysis for length of hospital stay (dependent variable), and HRV adjusting other risk factors
| |
Yes |
No |
β* |
95% CI |
P |
||
|---|---|---|---|---|---|---|---|
| Mean | (95% CI) | Mean | (95% CI) | ||||
| HRV |
7.7 |
(6.1 - 9.3) |
5.5 |
(4.7 - 6.2) |
2.2 |
(0.5 - 3.9) |
0.011 |
| Sex (female) |
6.8 |
(5.6 - 8.0) |
6.3 |
(5.4 - 7.3) |
0.4 |
(-0.6 - 1.5) |
0.419 |
| Age <6 months |
8.2 |
(7.0 - 9.3) |
5.0 |
(3.9 - 6.0) |
3.2 |
(2.0 - 4.3) |
<0.001 |
| Family Hx of asthma |
7.2 |
(6.2 - 8.2) |
6.0 |
(4.8 - 7.1) |
1.2 |
(0.1 - 2.3) |
0.035 |
| Prematurity |
6.7 |
(5.4 - 7.9) |
6.5 |
(5.5 - 7.4) |
-0.2 |
(-1.4 - 1.0) |
0.749 |
| Maternal smoking | 6.8 | (5.6 - 8.2) | 6.3 | (5.3 - 7.2) | 0.6 | (-0.6 - 1.8) | 0.354 |
Hx: history; * number of extra days in hospital, compared to negative counterparts.