Variations in length of stay by factors associated with patient's health condition and health service factors
| Variable | Number of admissions (%) | Median LOS (95% CI) | Mean LOS (95% CI) | Unadjusted HR (95% CI) | P | p For PH test* | Adjusted HR† (95% CI) | p | p For PH test* |
|---|---|---|---|---|---|---|---|---|---|
| Commissioning PCT | |||||||||
| Blackpool | 2189 (90.8%) | 6 (6 to 6) | 9.65 (8.96 to 10.33) | 1 | – | – | 1 | – | – |
| 221 (9.2%) | 5 (5 to 7) | 10.66 (7.88 to 13.43) | 1 (0.81 to 1.24) | 0.9900 | 0.0046 | 0.97 (0.76 to 1.24) | 0.8300 | 0.6736 | |
| Total | 2410 (100%) | 6 (6 to 6) | 9.79 (9.09 to 10.50) | – | – | 0.0046 | – | – | – |
| Primary diagnosis | |||||||||
| COPD with acute exacerbation, unspecified | 1210 (50.2%) | 5 (5 to 6) | 8.15 (7.57 to 8.72) | 1 | – | – | 1 | – | – |
| COPD with acute lower respiratory infection | 968 (40.2%) | 7 (6 to 7) | 11.29 (10.15 to 12.43) | 0.79 (0.73 to 0.86) | <0.0001 | 0.9057 | 0.81 (0.75 to 0.88) | <0.0001 | 0.9192 |
| Other COPD | 232 (9.6%) | 5 (4 to 6) | 11.56 (7.13 to 15.98) | 0.91 (0.76 to 1.08) | 0.2790 | 0.0047 | 0.93 (0.78 to 1.09) | 0.3570 | 0.0300 |
| Total | 2410 (100%) | 6 (6 to 6) | 9.79 (9.09 to 10.50) | – | – | 0.0163 | – | – | – |
| Charlson index | |||||||||
| 1 | 1829 (75.9%) | 6 (5 to 6) | 8.93 (8.33 to 9.53) | 1 | – | – | 1 | – | – |
| 2 | 404 (16.8%) | 7 (6 to 7) | 12.22 (9.58 to 14.86) | 0.82 (0.72 to 0.94) | 0.0050 | 0.9038 | 0.87 (0.76 to 0.99) | 0.0390 | 0.2730 |
| 3+ | 177 (7.3%) | 8 (7 to 8) | 13.27 (8.76 to 17.78) | 0.73 (0.63 to 0.86) | <0.0001 | 0.7163 | 0.81 (0.69 to 0.95) | 0.0080 | 0.2212 |
| Total | 2410 (100%) | 6 (6 to 6) | 9.79 (9.09 to 10.50) | – | – | 0.9352 | – | – | – |
| Specialty of admission | |||||||||
| Accident and emergency | 171 (7.1%) | 3 (1 to 5) | 5.87 (4.26 to 7.48) | 1 | – | – | 1 | – | – |
| General medicine | 2170 (90%) | 6 (6 to 6) | 10 (9.24 to 10.75) | 0.64 (0.50 to 0.82) | <0.0001 | 0.1253 | 0.67 (0.52 to 0.86) | 0.0020 | 0.0771 |
| Other | 69 (2.9%) | 6 (5 to 7) | 9.21 (6.39 to 12.04) | 0.64 (0.47 to 0.88) | 0.0060 | 0.1085 | 0.63 (0.45 to 0.88) | 0.0060 | 0.0254 |
| Total | 2410 (100%) | 6 (6 to 6) | 9.79 (9.09 to 10.50) | – | – | 0.2470 | – | – | – |
COPD,chronic obstructive pulmonary disease; LOS,length of stay; PH test, proportional hazard test.
*HR adjusted for all the main variables.