Table 1– Patient characteristics on admission for the entire cohort defined by a hospitalisation for chronic obstructive pulmonary disease or pneumonia and for those who died in hospital

	Entire cohort	In-hospital deaths
Patients n	323 895	32 414
Age at cohort entry years mean±sd	75.1±9.1	78.7±8.6
Males	54.6	59.9
Cohort entry after year 2000	48.4	47.9
Prior hospitalisations
0	42.4	46.5
1	18.8	18.8
2	11.0	10.3
≥3	27.8	24.4
Day of admission
Monday	14.8	14.5
Tuesday	15.1	15.4
Wednesday	15.1	15.2
Thursday	15.3	15.2
Friday	16.5	16.6
Saturday	12.0	12.0
Sunday	11.2	11.1
Modified chronic disease score^#
First quartile	25.0	24.7
Second quartile	25.3	23.4
Third quartile	24.7	24.7
Fourth quartile	25.0	24.7

Data are presented as % unless otherwise stated. ^#: at least one dispensed prescription, among the 94% of patients with available medication information in the year prior to cohort entry.