Table 1 Patient characteristics at week 1 of the referral scheme and weight change by start BMI category
BMI < 30 kg/m2 | BMI 30–34.9 kg/m2 | BMI 35–39.9 kg/m2 | BMI ≥ 40 kg/m2 | |||||||
|---|---|---|---|---|---|---|---|---|---|---|
Total n=3697 | Total n=11759 | Total n=9902 | Total n=8913 | |||||||
Mean | SD | Mean | SD | Mean | SD | Mean | SD | f-value | p-value | |
Height (m) | 1.65 | 0.08 | 1.64 | 0.08 | 1.64 | 0.08 | 1.64 | 0.08 | 48.60 | <0.001 |
Weight (kg) | 76.8 | 8.0 | 88.0 | 9.6 | 100.8 | 10.9 | 122.3 | 18.6 | 19885.38 | <0.001 |
Age (years) | 48.1 | 15.0 | 48.1 | 14.8 | 47.2 | 14.6 | 45.8 | 13.4 | 64.43 | <0.001 |
Weight change (kg) | −2.9 | 2.8 | −3.6 | 3.2 | −4.1 | 3.7 | −4.8 | 4.4 | 346.58 | <0.001 |
Percent weight change | −3.7 | 3.6 | −4.0 | 3.6 | −4.0 | 3.6 | −3.9 | 3.5 | 7.06 | <0.001 |
Weeks attended | 8.7 | 3.6 | 8.9 | 3.5 | 8.8 | 3.6 | 8.9 | 3.5 | 0.19 | 0.905 |
Start BMI (kg/m 2 ) | 28.2 | 1.4 | 32.5 | 1.4 | 37.3 | 1.4 | 45.4 | 5.2 | 44536.13 | <0.001 |
End BMI (kg/m 2 ) | 27.2 | 1.7 | 31.2 | 1.8 | 35.8 | 1.9 | 43.6 | 5.3 | 37989.02 | <0.001 |
BMI change (kg/m 2 ) | −1.1 | 1.0 | −1.3 | 1.2 | −1.5 | 1.3 | −1.8 | 1.6 | 387.75 | <0.001 |
Proportion achieving 5% Weight loss | 33.4% | 36.6% | 36.4% | 35.8% | 4.10 | 0.006 | ||||
Proportion achieving 10% Weight loss | 5.5% | 6.1% | 6.2% | 5.4% | 3.69 | 0.011 | ||||