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Reporting of demographic variables in 100 RCTs published in four leading general medicine journals
| Demographic variable | Percentage of papers reporting that variable |
|---|---|
| Age | 99 |
| Sex | 99 |
| Weight/BMI | 39 |
| Ethnicity | 37 |
| Smoking | 24 |
| Educational attainment | 23 |
| Marital Status | 13 |
| Any area-based measure (eg index of deprivation or disadvantage, rurality distance from health centres etc) | 10 |
| Employment status | 10 |
| Alcohol | 4 |
| Occupational status | 2 |
| Income | 2 |
| Language spoken | 0 |
