Cox proportional hazards model investigating time to multiple weight management interventions after a record of overweight or obesity
| Patients receiving weight management intervention (n) | Total patients (N) | HR | 95% CI | p Value | |
|---|---|---|---|---|---|
| Age (decades) | – | – | 1.42 | 1.27 to 1.58 | <0.001 |
| Age squared | – | – | 0.97 | 0.96 to 0.98 | <0.001 |
| Gender | |||||
| Male | 6104 | 48 413 | 1.00 | – | – |
| Female | 7054 | 43 000 | 1.14 | 1.10 to 1.19 | <0.001 |
| BMI category* | |||||
| Overweight (BMI 25–29.9) | 5019 | 50 075 | 1.00 | – | – |
| Obese (BMI 30–34.9) | 4263 | 19 812 | 1.68 | 1.60 to 1.76 | <0.001 |
| Severe obesity (BMI 35–39.9) | 2186 | 5959 | 2.36 | 2.23 to 2.50 | <0.001 |
| Morbid obesity (BMI ≥40) | 1690 | 2409 | 3.67 | 3.45 to 3.91 | <0.001 |
| Smoking status | |||||
| Non-smoker | 5441 | 32 576 | 1.00 | – | – |
| Former smoker | 3962 | 24 142 | 1.11 | 1.06 to 1.16 | <0.001 |
| Current smoker | 2530 | 14 277 | 0.99 | 0.94 to 1.05 | 0.823 |
| Missing smoking status | 1225 | 10 260 | 0.82 | 0.77 to 0.88 | <0.001 |
| IMD quintile | |||||
| 1—least deprived | 2564 | 18 155 | 1.00 | – | – |
| 2 | 2490 | 17 635 | 0.94 | 0.88 to 1.00 | 0.054 |
| 3 | 2511 | 14 243 | 1.20 | 1.12 to 1.29 | <0.001 |
| 4 | 2413 | 12 859 | 1.13 | 1.06 to 1.21 | <0.001 |
| 5—most deprived | 2277 | 10 337 | 1.24 | 1.15 to 1.32 | <0.001 |
| Missing IMD | 903 | 5026 | 1.04 | 0.95 to 1.13 | 0.395 |
| CHD | 1993 | 9669 | 1.24 | 1.16 to 1.31 | <0.001 |
| Stroke | 535 | 2603 | 1.09 | 0.98 to 1.21 | 0.116 |
| Type 2 diabetes | 4401 | 12 884 | 1.83 | 1.75 to 1.92 | <0.001 |
| Depression | 6385 | 31 573 | 1.33 | 1.28 to 1.39 | <0.001 |
*BMI group at baseline. Patients could change BMI category in the analysis so intervention may have been delivered when patients had changed BMI category.
BMI, body mass index; CHD, coronary heart disease; IMD, Index of Multiple Deprivation.