Table 3– Crude and adjusted hazard ratios (HRs) of in-hospital death according to the day of admission and the day of stay, estimated by Cox proportional hazards model

	Day of admission		Day of stay
	Crude HR	Adjusted^# HR (95% CI)	Crude HR	Adjusted^# HR (95% CI)
Weekday^¶ (reference)	1.00	1.00 (reference)	1.00	1.00 (reference)
Friday	0.98	0.97 (0.95–1.00)	1.05	1.05 (1.02–1.08)
Weekend	1.06	1.06 (1.03–1.09)	1.07	1.07 (1.04–1.09)

^#: for age, sex, calendar year of admission, admission day (weekday, Friday or weekend), prior hospitalisation and the modified chronic disease score divided into quartiles with a fifth category to account for subjects with no medication information in the year prior to cohort entry; ^¶: Monday–Thursday inclusive.