Table 1 Patient demographics and preoperative functional scores according to sex for the study cohort (n = 3510)
Demographic | Description | Sex | Difference / Odds Ratio (95% CI) | P-value* | |
|---|---|---|---|---|---|
Male (n = 1584) | Female (n = 1926) | ||||
Age (years: mean, SD) | 69.4 (9.1) | 69.2 (10.2) | Diff 0.2 (−0.5 to 0.8) | 0.65 | |
BMI (Kg/M2: mean, SD) | 29.4 (4.5) | 30.5 (7.7) | Diff 1.1 (−0.7 to 1.6) | < 0.001 | |
Comorbidity (n, % of group) | Heart Disease (n = 538) | 322 (20.3) | 216 (11.2) | OR 0.5 (0.4 to 0.6) | < 0.001** |
Hypertension (n = 1726) | 802 (50.6) | 924 (48.0) | OR 0.9 (0.8 to 1.0) | 0.12** | |
Lung disease (n = 499) | 200 (12.6) | 299 (15.5) | OR 1.3 (1.1 to 1.5) | 0.01** | |
Neurological disease (n = 186) | 91 (5.7) | 95 (4.9) | OR 0.9 (0.6 to 1.1) | 0.29** | |
Diabetes mellitus (n = 398) | 199 (12.6) | 199 (10.3) | OR 0.8 (0.7 to 1.0 | 0.04** | |
Gastric ulceration (n = 419) | 137 (8.6) | 282 (14.6) | OR 1.8 (1.5 to 2.2) | < 0.001** | |
Kidney disease (n = 94) | 39 (2.5) | 55 (2.9) | OR 1.2 (0.8 to 1.8) | 0.47** | |
Liver disease (n = 48) | 25 (1.6) | 23 (1.2) | OR 0.7 (0.4 to 1.3) | 0.33** | |
Anaemia (n = 205) | 69 (4.4) | 136 (7.1) | OR 1.7 (1.2 to 2.2) | 0.001** | |
Cancer (n = 156) | 84 (5.3) | 72 (3.7) | OR 0.69 (0.5 to 0.9) | 0.03** | |
Back pain (n = 1572) | 593 (37.4) | 979 (50.8) | OR 1.7 (1.5 to 2.0) | < 0.001** | |
Depression (n = 444) | 128 (8.1) | 316 (16.4) | OR 2.2 (1.8 to 2.8) | < 0.001** | |
WOMAC (mean, SD) | Pain | 38.7 (17.9) | 32.7 (17.5) | Diff 6.0 (4.9 to 7.2) | < 0.001 |
Function | 40.1 (18.0) | 34.5 (16.7) | Diff 5.7 (4.5 to 6.8) | < 0.001 | |
Stiffness | 41.6 (34.2) | 34.2 (19.2) | Diff 7.4 (6.0 to 8.7) | < 0.001 | |
Total | 40.0 (16.9) | 34.0 (15.9) | Diff 5.9 (4.8 to 7.0) | < 0.001 | |
SF-12 (mean, SD) | Physical | 28.6 (7.7) | 27.7 (7.5) | Diff 0.9 (0.4 to 1.4) | 0.001 |
Mental | 48.7 (13.2) | 45.8 (13.6) | Diff 2.9 (2.0 to 3.8) | < 0.001 | |