Table 3.

Adjusted mortality risk at 90 days and at 90‐ to 180‐days from admission for inpatients with pressure ulcers, by Cox proportional hazard analysis

Variables	90‐day mortality risk Adjusted hazard ratio N = 5870	90‐ to 180‐day mortality risk Adjusted hazard ratio N = 3204
Demographic characteristics
Age (years)	1·02 (1·02–1·02), P < 0·001	1·02 (1·01–1·12), P < 0·001
Male sex	1·15 (1·06–1·24), P = 0·001	1·37 (1·16–1·62), P < 0·001
Black race*	0·92 (0·84–1·01), P = 0·081	0·97 (0·80–1·17), P = 0·799
Hispanic race*	1·13 (1·01–1·26), P = 0·032	1·61 (1·30–2·00), P < 0·001
Clinical characteristics
DRG weight	–	1·06 (1·04–1·08), P < 0·001
Systemic infection or fever	1·50 (1·37–1·63), P < 0·001	–
Laboratory values
Albumin (g/dl)	0·57 (0·53–0·60), P < 0·001	0·69 (0·61–0·79), P < 0·001
White blood cells (k/µl)	1·00 (1·00–1·01), P = 0·046	–
Haematocrit (%)	1·01 (1·01–1·02), P = 0·001	–
Sodium (mEq/l)**	–	–
Glucose (mg/dl)	–	–
Estimated glomerular filtration rate on admission (ml/min/1·73 m2)	–	–
Comorbid disease
Diabetes	1·31 (1·12–1·55), P = 0·001	1·63 (1·14–2·34), P = 0·007
Congestive heart failure	1·35 (1·25–1·47), P < 0·001	1·26 (1·07–1·50), P = 0·007
Chronic renal failure	1·46 (1·35–1·59), P < 0·001	1·34 (1·12–1·60), P = 0·001
Any liver disease	1·21 (1·07–1·36), P = 0·002	–
Human immunodeficiency virus/AIDS	1·40 (1·09–1·79), P = 0·008	–
Dementia	–	–
Cerebrovascular disease	1·17 (1·06–1·29), P = 0·002	–
Hemiplegia/paraplegia	–	–
Myocardial infarction	1·35 (1·20–1·52), P < 0·001	–
Peripheral vascular disease	–	–
Chronic pulmonary disease	–	–
Rheumatic disease	–	–
Peptic ulcer	–	1·50 (1·01–2·23), P = 0·045
Any malignancy**	–	1·62 (1·23–2·12), P < 0·001
Metastatic cancer	2·48 (2·06–2·99), P < 0·001	1·53 (1·06–2·22), P = 0·024
Interaction terms
Systemic infection/fever – metastatic cancer	0·54 (0·41–0·72), P < 0·001

^*Hazard ratios for race were compared with patients with ‘White’ or ‘Other’ race. **90‐day model: stratified for any malignancy and for sodium.