Sociodemographic characteristics of NEXT respondents (total N=2752) and their residential neighbourhoods by survey wave, % or mean (SE)*
| Characteristic | Wave 1 (n=2486) | Wave 2 (n=2388) | Wave 3 (n=2354) | Wave 4 (n=2088) | Wave 5 (n=2118) | Wave 6 (n=2042) |
| Depressive symptom T-score | 50.7 (0.4) | 51.2 (0.5) | 50.5 (0.6) | 50.4 (0.4) | 51.2 (0.4) | 50.9 (0.4) |
| Neighbourhood | ||||||
| Social Fragmentation Index† | ||||||
| Lowest quartile | 33.2 (4.9) | 32.2 (5.3) | 32.6 (5.6) | 35.9 (3.7) | 36.3 (4.2) | 33.9 (4.6) |
| Second quartile | 43.8 (6.3) | 43.4 (6.2) | 40.4 (6.1) | 29.2 (3.2) | 32.2 (3.6) | 32.3 (3.8) |
| Third quartile | 14.3 (4.2) | 15.6 (4.5) | 17.2 (4.5) | 18.4 (3.0) | 18.4 (2.7) | 19.9 (3.0) |
| Highest quartile | 8.8 (3.7) | 8.9 (3.6) | 9.9 (3.7) | 16.5 (2.4) | 13.0 (2.8) | 13.8 (3.0) |
| Gini coefficient of income inequality† | ||||||
| Lowest quartile | 29.5 (5.7) | 29.6 (5.8) | 27.8 (5.3) | 28.3 (3.8) | 29.4 (3.4) | 28.8 (3.5) |
| Second quartile | 25.0 (2.5) | 24.2 (2.4) | 25.4 (2.9) | 24.7 (2.7) | 26.8 (2.9) | 25.6 (3.0) |
| Third quartile | 25.6 (4.3) | 24.8 (4.1) | 23.9 (3.5) | 24.9 (3.8) | 26.1 (3.0) | 26.5 (3.1) |
| Highest quartile | 19.9 (5.3) | 21.4 (5.6) | 23.0 (5.4) | 22.2 (2.0) | 17.7 (2.9) | 19.1 (3.1) |
| Median household income† | ||||||
| Lowest quartile | 20.1 (5.6) | 21.3 (5.8) | 20.7 (5.2) | 23.3 (2.8) | 20.7 (2.4) | 22.4 (3.0) |
| Second quartile | 18.0 (3.6) | 17.6 (3.4) | 20.2 (3.2) | 20.9 (2.5) | 21.0 (2.6) | 22.3 (3.0) |
| Third quartile | 30.1 (4.9) | 29.5 (4.8) | 28.6 (4.6) | 30.2 (3.1) | 29.1 (3.2) | 26.4 (3.3) |
| Highest quartile | 31.8 (5.5) | 31.6 (5.7) | 30.5 (5.5) | 25.6 (3.6) | 29.2 (4.3) | 28.9 (4.3) |
| Percentage of minority residents† | ||||||
| Lowest quartile | 33.0 (5.5) | 32.8 (5.8) | 31.6 (5.7) | 36.1 (4.6) | 34.0 (4.7) | 32.1 (5.0) |
| Second quartile | 44.9 (6.9) | 43.4 (6.8) | 43.7 (6.8) | 38.8 (4.9) | 42.4 (5.7) | 40.3 (6.0) |
| Third quartile | 13.5 (3.6) | 12.7 (3.5) | 13.6 (3.6) | 14.3 (3.3) | 14.2 (3.2) | 15.3 (3.3) |
| Highest quartile | 8.6 (4.5) | 11.1 (5.2) | 11.1 (5.2) | 10.9 (3.2) | 9.4 (3.2) | 12.3 (4.2) |
| Respondent/ F amily | ||||||
| Sex (% male) | 45.6 (1.7) | 44.8 (1.8) | 44.8 (1.6) | 41.2 (2.0) | 40.1 (1.9) | 38.4 (1.9) |
| Age | 16.3 (0.03) | 17.2 (0.03) | 18.2 (0.03) | 19.2 (0.02) | 20.3 (0.02) | 21.3 (0.02) |
| Race or ethnicity | ||||||
| Non-Hispanic White | 57.8 (5.4) | 58.8 (6.0) | 58.8 (6.0) | 62.1 (5.8) | 61.1 (5.3) | 57.1 (6.3) |
| Non-Hispanic Black/African-American | 17.6 (3.6) | 17.3 (4.1) | 17.1 (4.1) | 13.5 (3.3) | 13.6 (3.4) | 19.7 (4.9) |
| Hispanic or Latino | 19.7 (3.9) | 19.5 (4.0) | 19.9 (3.9) | 19.5 (4.3) | 19.9 (3.8) | 18.7 (3.8) |
| Other | 5.0 (1.1) | 4.3 (1.0) | 4.1 (0.8) | 4.9 (1.0) | 5.4 (1.0) | 4.5 (1.1) |
| Family affluence | ||||||
| Low | 23.9 (2.7) | 23.0 (2.9) | 23.0 (3.1) | 22.2 (2.7) | 22.5 (2.6) | 22.4 (3.1) |
| Moderate | 48.8 (1.5) | 49.8 (1.2) | 49.0 (1.5) | 48.3 (1.8) | 49.2 (1.5) | 49.5 (1.6) |
| High | 27.3 (2.5) | 27.2 (2.5) | 28.0 (2.8) | 29.4 (2.7) | 28.4 (2.6) | 28.1 (2.7) |
*Wave-specific percentages for some variables do not add to 100% because of rounding.
†Neighbourhood measures at each wave were standardised to a mean of 0 and SD of 1 in all US census tracts.