Discharge prescribing practices before and after intervention
| 2016 | 2019 | P value | |
| Oral morphine equivalents (mg) | 210.0 (150.0–300.0) | 146.3 (90.0–160.0) | <0.001 |
| Hip replacement | 200.0 (150.0–280.0) | 150.0 (75.0–200.0) | 0.01 |
| Knee replacement | 210.0 (150.0–300.0) | 120.0 (100.0–150.0) | <0.001 |
| Dispensed strong opioid (per cent) | 151 (71.6) | 94 (46.8) | <0.001 |
| Hip replacement | 59 (67.8) | 31 (44.3) | 0.008 |
| Knee replacement | 92 (74.2) | 63 (48.1) | <0.001 |
| Dispensed morphine (per cent) | 58 (38.4) | 41 (43.6) | 0.43 |
| Hip replacement | 21 (36.5) | 15 (48.4) | 0.27 |
| Knee replacement | 37 (40.2) | 26 (41.3) | 1 |
| Dispensed sustained release drug (per cent) | 66 (43.7) | 7 (7.4) | <0.001 |
| Hip replacement | 19 (32.2) | 2 (6.5) | 0.002 |
| Knee replacement | 47 (51.1) | 5 (7.9) | <0.001 |
| Paracetamol (percent) | 210 (99.5) | 197 (98.0) | 0.21 |
| Hip replacement | 86 (98.9) | 69 (98.6) | 1 |
| Knee replacement | 124 (100.0) | 128 (97.7) | 0.25 |
| Paracetamol regularly (per cent) | 118 (56.2) | 117 (59.4) | 0.55 |
| Hip replacement | 47 (54.7) | 42 (60.9) | 0.51 |
| Knee replacement | 71 (57.3) | 75 (58.6) | 0.9 |
| NSAID (per cent) | 37 (17.5) | 81 (40.3) | <0.001 |
| Hip replacement | 19 (21.8) | 28 (40.0) | 0.02 |
| Knee replacement | 18 (14.5) | 53 (40.5) | <0.001 |
| NSAID regularly (per cent) | 12 (32.4) | 47 (75.8) | <0.001 |
| Hip replacement | 10 (52.6) | 16 (72.7) | 0.21 |
| Knee replacement | 2 (11.1) | 31 (77.5) | <0.001 |
| NSAIDs (per cent) | <0.001 | ||
| Celecoxib | 4 (10.8) | 57 (87.7) | |
| Diclofenac | 11 (29.7) | 2 (3.1) | |
| Etoricoxib | 0 (0.0) | 1 (1.5) | |
| Ibuprofen | 19 (51.4) | 5 (7.7) | |
| Naproxen | 3 (8.1) | 0 (0.0) | |
| Tramadol (per cent) | 83 (39.3) | 124 (61.7) | <0.001 |
| Hip replacement | 35 (40.2) | 42 (60.0) | 0.02 |
| Knee replacement | 48 (38.7) | 82 (62.6) | <0.001 |
| Gabapentinoids (per cent) | 6 (2.8) | 35 (17.4) | <0.001 |
| Hip replacement | 0 (0.0) | 14 (20.0) | <0.001 |
| Knee replacement | 6 (4.8) | 21 (16.0) | 0.004 |
| Proton pump inhibitor (per cent) | 7 (3.3) | 86 (42.8) | <0.001 |
| Antiemetics (per cent) | 85 (40.3) | 70 (34.8) | 0.27 |
| Laxatives (per cent) | 169 (80.1) | 167 (83.1) | 0.45 |