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Table 1 Patient characteristics at week 1 of the referral scheme and weight change by start BMI category

From: Service evaluation of weight outcomes as a function of initial BMI in 34,271 adults referred to a primary care/commercial weight management partnership scheme

  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