Table 1 Characteristics of cohort by pre-surgical opioid use status
|  | Non-opioid user N = 439a | Opioid user N = 82a | P-value |
|---|---|---|---|
Wait time for surgery, days | 332.6 (53) | 307.0 (93) | 0.017 |
Age | 68.0 (9.8) | 67.3 (9.0) | 0.536 |
Male | 154 (35.1) | 26 (31.7) | 0.556 |
Body mass index | 32.5 (6.3) | 35.1 (8.4) | 0.001 |
Total hip arthroplasty | 108 (24.6) | 32 (39.0) | 0.007 |
Unilateral procedure | 423 (96.4) | 80 (97.6) | 0.583 |
Osteoarthritis | 420 (95.7) | 78 (95.1) | 0.824 |
ASA score 3 or 4 (n = 517) | 198 (45.5) | 48 (58.5) | 0.030 |
Education level (n = 498) |  |  | 0.028 |
 Yr 8 or below | 127 (30.3) | 12 (15.2) |  |
 Yrs 9–10 | 169 (40.3) | 38 (48.1) |  |
 Yrs 11–12 | 94 (22.4) | 25 (31.7) |  |
Degree | 29 (6.9) | 4 (5.1) | Â |
Employed (n = 460) | 79 (20.2) | 13 (18.8) | 0.794 |
Daily simple analgesics (n = 520) | 241 (55.0) | 46 (56.1) | 0.856 |
Daily nonsteroidal medication (n = 518) | 100 (22.9) | 25 (30.9) | 0.123 |
Requiring an interpreter | 141 (32.1) | 14 (17.1) | 0.006 |
Current smoker | 31 (7.1) | 16 (19.5) | 0.0003 |
Alcohol use daily (2 or more) (n = 499) | 18 (4.3) | 6 (7.6) | 0.25 |
Other lower limb or back pain (n = 499) | 250 (59.5) | 52 (65.8) | 0.29 |
Heart disease | 106 (24.2) | 22 (26.8) | 0.60 |
Diabetes (1 or 2) | 103 (23.5) | 18 (22.0) | 0.766 |
Chronic lung disease | 83 (18.9) | 19 (23.2) | 0.37 |
Mental health condition | 66 (15.0) | 23 (28.1) | 0.004 |
Central nervous system disorder | 41 (9.3) | 7 (8.5) | 0.818 |
Hypertension | 297 (67.7) | 59 (72.0) | 0.443 |
Oxford knee or hip scoreb pre-surgery, n = 422 | 18.7 (8.3) | 15.2 (7.5) | 0.001 |
EQ VASc pre-surgery, n = 421 | 64.4 (22.0) | 60.2 (20.0) | 0.146 |