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Table 4 Results of patient-level GEE analyses

From: Cluster randomised trial of a tailored intervention to improve the management of overweight and obesity in primary care in England

  Control Intervention   Odds ratio
  (n = 32079; 16 practices) (n = 17728; 12 practices) ICC OR (95 % CI) p value
Primary outcome      
 Weight management 15.1 % (10.8 %) 13.2 % (5.9 %) 0.094 1.17 (0.72, 1.89) 0.53
Secondary outcomes      
 BMI or waist circumference measureda 42.7 % (10.3 %) 39.6 % (10.6 %) 0.031 1.15 (0.89, 1.48) 0.28
 Referral to external weight loss services 5.1 % (3.4 %) 3.7 % (3.4 %) 0.026 1.45 (0.81, 2.63) 0.21
 Internal weight management 9.6 % (9.1 %) 8.7 % (6.7 %) 0.123 1.09 (0.55, 2.15) 0.81
 Lifestyle assessment 23.1 % (7.6 %) 23.9 % (6.1 %) 0.025 0.98 (0.76, 1.26) 0.88
 Weight loss of at least 1 kgb 42.2 % (4.1 %) 41.7 % (4.1 %) 0.003 0.98 (0.87, 1.09) 0.67
     Mean difference
     Mean (95 % CI) p-value
BMIc 30.4 (0.9) 30.5 (1.1) 0.000 0.08 (−0.12, 0.28) 0.43
Weightb 85.3 (3.2) 87.5 (1.2) 0.002 0.05 (−0.32, 0.41) 0.81
  1. An odds ratio <1 favours the intervention group. A mean difference >0 favours the intervention group. xx.x% (xx.x%) = mean (SD)
  2. aControl (n = 20955), intervention (n = 12171)
  3. bControl (n = 9769), intervention (n = 5784)
  4. cControl (n = 2440), intervention (n = 1243)