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. 2013 Dec 6;2013(12):CD002128. doi: 10.1002/14651858.CD002128.pub5

Coates WHT MP 1999.

Methods RCT of parallel group design.
Participants Post‐menopausal women from minority and low socioeconomic class populations consuming at least 35% of energy from fat. Women recruited from clinics in Georgia, Alabama and Florida. Women had no major chronic disease and were not on lipid‐lowering medication. 2208 women randomised (60% to the intervention), mean age 60 years.
Interventions Intervention to reduce fat intake to 20% energy or less. A nutritionalist assigned fat gram goals to each participant. Group sessions were held weekly for 6 weeks, fortnightly for 6 weeks, and monthly for 9 months and then quarterly. Sessions included nutritional information and behavioural change strategies. Elements of the program were enhanced or added to meet the needs of a diverse population. The comparison group received "dietary guidelines for Americans" but were not counselled. Intervention lasted for 2 years, with follow‐up at 6, 12 and 18 months. Data abstracted for 6 months follow‐up as thereafter follow‐up was poor.
Outcomes Total dietary fat and saturated fat (% Kcal), fruit servings per day, vegetable servings per day.
Notes  
Risk of bias
Bias Authors' judgement Support for judgement
Random sequence generation (selection bias) Unclear risk See Table 1
Allocation concealment (selection bias) Unclear risk See Table 1
Blinding of participants and personnel (performance bias) 
 All outcomes Unclear risk See Table 1
Blinding of outcome assessment (detection bias) 
 All outcomes Unclear risk See Table 1
Incomplete outcome data (attrition bias) 
 All outcomes Unclear risk See Table 1