Table 1 Collection and uses of measures of socioeconomic status within intervention trials overall, and by year, region and behavioural outcome
|  |  | All studies (n = 98) | Study year (completed studies) | Region | Behavioural outcome | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
2008-2010 (N = 42) | 2011-2014 (N = 56) | Europe (N = 58) | N America (N = 24) | Australasia (N = 9) | Asia (N = 3) | S America (N = 4) | Diet (N = 19) | Physical activity (N = 20) | Diet and PA (N = 21) | Smoking (N = 15) | Alcohol (N = 12) | Smoking and alcohol (N = 11) | |||
Measure collected | Any measure of SES | 71 | 26 | 45 | 46 | 15 | 7 | 1 | 2 | 14 | 14 | 16 | 13 | 8 | 6 |
School level (e.g. Free School Meals) | 32 | 12 | 20 | 14 | 11 | 6 | 1 | 0 | 7 | 7 | 5 | 6 | 3 | 4 | |
Family level (e.g. parental income) | 48 | 18 | 30 | 37 | 7 | 3 | 0 | 2 | 8 | 10 | 11 | 9 | 6 | 5 | |
Use of SES measures | Sample descriptions | 53 | 22 | 31 | 34 | 12 | 4 | 1 | 2 | 11 | 9 | 15 | 4 | 6 | 4 |
Control variables | 24 | 8 | 16 | 16 | 3 | 4 | 0 | 1 | 6 | 4 | 6 | 5 | 2 | 1 | |
Sampling procedures | 19 | 9 | 10 | 9 | 5 | 4 | 1 | 0 | 4 | 4 | 3 | 3 | 3 | 2 | |
Analysis of differential effect | 21a | 8 | 13 | 18a | 1 | 1 | 1 | 0 | 4 | 1 | 8 | 4 | 2 | 2 | |