Table 3.

Univariate Cox regression analysis of all variables for mortality at 30 days and one year: final step. Figures are hazard ratios (95% confidence intervals)

	30 day mortality	1 year mortality
Male sex	1.9 (1.4 to 2.5)**	1.8 (1.5 to 2.1)**
Age (years)†:
60-69	1
70-79	1.2 (0.6 to 2.4)	1.4 (0.9 to 2.0)
80-89	1.9 (0.97 to 3.6)	2.1 (1.5 to 3.0)
≥90	2.7 (1.4 to 5.2)	3.0 (2.1 to 4.3)
Comorbidities
Cardiovascular disease	1.2 (0.9 to 1.6)	1.4 (1.2 to 1.6)**
Stroke	1.4 (1.0 to 1.9)	1.2 (0.9 to 1.4)
Respiratory disease	1.9 (1.4 to 2.5)**	1.6 (1.3 to 1.9)**
Renal disease	2.8 (1.6 to 4.6)**	2.7 (1.8 to 3.4)**
Diabetes	1.2 (0.8 to 1.8)	1.4 (1.2 to 1.8)*
Rheumatoid disease	1.0 (0.5 to 2.0)	0.8 (0.5 to 1.3)
Parkinson's disease	1.6 (0.9 to 2.7)	1.4 (1.0 to 1.9)*
Malignancy	1.7 (1.1 to 2.5)*	1.6 (1.3 to 2.0)**
Paget's disease	0.8 (0.1 to 5.7)	2.1 (1.0 to 4.5)*
Current smokers	0.5 (0.2 to 0.8)	0.9 (0.7 to 1.1)
Enteral steroids	1.8 (0.9 to 3.6)	2.0 (1.4 to 3.0)
No of comorbidities†:
0	1	1
1	1.3 (1.1 to 1.5)	1.2 (1.0 to 1.5)
2	1.7 (1.5 to 2.1)	1.7 (1.4 to 2.0)
≥3	2.4 (1.9 to 3.1)	2.4 (1.9 to 3.1)
Postoperative complications
Chest infection	8.5 (6.6 to 11.1)**	5.0 (4.2 to 6.0)**
Cardiac failure	16.1 (12.2 to 21.3)**	11.3 (9.1 to 14.0)**
DVT/PE	5.1 (3.1 to 8.6)**	2.6 (1.7 to 3.8)
Deep infection	0.1 (0 to 10.7)	2.1 (1.3 to 3.4)*
Urinary tract infection	0.7 (0.3 to 1.5)	1.1 (0.8 to 1.5)
Gastrointestinal bleed	3.7 (1.7 to 8.4)*	3.0 (1.7 to 5.2)**
Myocardial infarction	4.6 (2.4 to 9.0)**	3.5 (2.2 to 5.7)**
Stroke	3.1 (1.6 to 6.0)*	3.5 (2.3 to 5.2)**
No of complications†:
0	1	1
1	5.6 (4.1 to 7.6)	2.9 (2.2 to 3.2)
2	13.0 (9.3 to 18.0)	6.5 (5.2 to 8.1)
≥3	8.8 (4.7 to 16.5)	5.8 (3.9 to 8.5)

DVT/PE=deep vein thrombosis/pulmonary embolus.

^*P<0.05; ^**P<0.01.

^†P<0.01 for 30 day and one year mortality.