Is there a weekend effect in hip fracture patients presenting to a United Kingdom teaching hospital?

Table 3 Estimated model coefficients for the multivariate logistic regression model - time to surgery

Outcome 1	Time to surgery (< 36 h)	n = 796
Variable	Level	OR	95%CI	P-value
ASA grade	1-5	0.68	0.54, 0.85	0.001
Season	Winter (reference)			0.014
	Spring	1.89	1.21, 2.94	0.005
	Summer	1.7	1.11, 2.61	0.014
	Autumn	1.9	1.23, 2.92	0.004
Time of week	Weekday (reference)
	Weekend	1.01	0.73, 1.39	0.975

ASA: American Society of Anesthesiologist.