Summary of patient characteristics by study
| Study | Cohort | Source | Included patients, n a | GP practices, n | Mean age, years | Male, % | Ethnic group | Socioeconomic status | Mean BMI | Proportion with BMI record (within specified timeframe)b | Proportion with record of weight loss intervention |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Artac 201334 | 40–74 years without known CVD or diabetes | Hammersmith and Fulham GP practices | 42 306 | 28 | 52.2 | 46.2 | 35.9% white British, | ‘Diverse’ 2.5% South Asian, and 8.6% black (data missing 22.3%) | 26.6 | Males: 57.9% Females: 60.7% (within 5 years) in 2008/2009 | Not measured |
| Bhaskaran 201335 | >16 years with any historical BMI record | CPRD database | 325 948 | – | -– | – | – | – | ∼26 | 79% (any record) 52% (within 3 years) in 2011 | Not measured |
| Dalton 201136 | 35–74 years without known CVD or diabetes | North West London GP practices | 21 510 | 14 | 50.2 | 52.9 | 38.5% white, 39.6% South Asian, 10.4% black (data missing for 55%) | More deprived than the UK | – Females: 67.6% (within 5 years) in 2008/2009 | Males: 79.3% | Not measured |
| Osborn 201133 | >18 years without SMI or CVD | THIN database | 95 512 | 420 | 53.2 | 47.4 | – | Similar to the UK | – | Males: 27.6% Females: 37.3% (within 1 year) in 2007 | Not measured |
| Booth 201532 | >18 years, BMI ≥25 record within the study period | CPRD database | 91 413 | 491 | 56 | 53 | – | Low levels of deprivation | – | All, by definition | Morbidly obese: males 40%, females 41.9% Non-morbidly obese: males 15.8%, females 19.8% within 2005–2012 |
| Booth 201331 | >18 years, BMI ≥30 or medical code for obesity 1997–2007 | GPRD database | 40 728 | 127 | – | 41 | – | Higher numbers in most deprived quintiles | 37 female 35.5 male | Males: 45.6% Females: 52.1%, within 2009 | Not measured |
| Goodfellow 201637 | >16 years, BMI ≥25 before the study period | East Midlands GP practices | 32 079 | 16 | 50 | 47.5 | 65.6% white, 16.7% South Asian, 6.3% black | More deprived than the UK | 30.2 (SD 5.4) average | 42.7% (SD 10.3%)c within 11-month study period 2013/2014 | 15.1% (SD 10.8%) offered within 11-month study period 2013/2014 |
↵a Only from the group and time period of meeting inclusion criteria. The study may have reported on a larger group overall.
↵b Data shown are from most recent time period if the study reported on multiple periods.
↵c BMI or waist circumference recorded. – = not stated. Morbidly obese refers to a BMI ≥40 kg/m2. BMI = body mass index. CVD = cardiovascular disease. CPRD = Clinical Practice Research Datalink. GPRD = General Practice Research Database. SD = standard deviation. SMI = serious mental illness. THIN = The Health Improvement Network.