Table 6

Variables associated with length of stay ⩾ 24 hours

		Univariate analysis				Logistic regression
		Odds ratio	95% CI			Odds ratio	95% CI
Admission time
Day	Baseline			Baseline
Evening	0.82	0.51 to 1.33		0.66	0.35 to 1.25
Night	0.16^**	0.11 to 0.25		0.10^*	0.05 to 0.19
Time ill before presentation
⩽ 6 hours	Baseline			Baseline
> 6 and ⩽ 24 hours	0.58^**	0.44 to 0.75		1.87	0.83 to 4.20
> 24 hours	1.09	0.80 to 1.50		2.13^*	1.16 to 3.91
Route of admission
GP and other	Baseline			Baseline
A&E department	0.69^*	0.49 to 0.98		NS	–
Discharge diagnoses
Asthma	2.93^*	1.24 to 6.93		4.62^*	1.20 to 17.77
Ingestion	0.37^**	0.20 to 0.66		0.23^*	0.07 to 0.72

Logistic regression is adjusted for variables on which information was available at discharge with p < 0.1 in univariate analysis.
6-150 p ⩽ 0.05; ^**p ⩽ 0.01.