Table 1.
Summary statistics, PSID-CDS, 1990–2014.
| Total | 1997 CDS Cohort | 2014 CDS Cohort | |
|---|---|---|---|
| (N = 4535) | (N = 1319) | (N = 3216) | |
| Child-Level | |||
| Childhood asthma, no. (%) | |||
| No | 3868 (85.29) | 1180 (89.46) | 2688 (83.58) |
| Yes | 667 (14.71) | 139 (10.54) | 528 (16.42) |
| Early-life NO2 (ppb), mean (SD) | 12.80 (6.59) | 15.93 (7.38) | 11.51 (5.76) |
| Early-life PM2.5 (µ/m3), mean (SD) | 12.73 (3.31) | 14.97 (3.03) | 11.81 (2.97) |
| Early-life NH poverty, no. (%) * | |||
| Low (<10%) | 1677 (37.00) | 515 (39.04) | 1162 (36.15) |
| Moderate (10–20%) | 1391 (30.69) | 386 (29.26) | 1005 (31.27) |
| High (>20%) | 1465 (32.32) | 418 (31.69) | 1047 (32.58) |
| Age (years), mean (SD) | 7.15 (4.17) | 3.86 (1.98) | 8.49 (4.09) |
| Sex, no. (%) | |||
| Male | 2282 (50.32) | 670 (50.80) | 1612 (50.12) |
| Female | 2253 (49.68) | 649 (49.20) | 1604 (49.88) |
| Parental asthma history, no. (%) | |||
| No | 3735 (82.36) | 1075 (81.50) | 2660 (82.71) |
| Yes | 800 (17.64) | 244 (18.50) | 556 (17.29) |
| Household-Level | |||
| HH age (years), mean (SD) | 37.82 (10.52) | 34.62 (9.04) | 39.13 (10.81) |
| HH sex, no. (%) | |||
| Male | 3209 (70.76) | 968 (73.39) | 2241 (69.68) |
| Female | 1326 (29.24) | 351 (26.61) | 975 (30.32) |
| HH race, no. (%) | |||
| NL White | 2394 (52.79) | 744 (56.41) | 1650 (51.31) |
| NL Black | 1815 (40.02) | 546 (41.39) | 1269 (39.46) |
| NL Asian | 24 (0.53) | 1 (0.08) | 23 (0.72) |
| NL Other/Multi | 23 (0.51) | 5 (0.38) | 18 (0.56) |
| Latino | 279 (6.15) | 23 (1.74) | 256 (7.96) |
| HH employment, no. (%) | |||
| Unemployed | 665 (14.66) | 177 (13.42) | 488 (15.17) |
| Employed | 3870 (85.34) | 1142 (86.58) | 2728 (84.83) |
| Income (year 2000 $), mean (SD) | 53,137 (89177) | 49,821 (45549) | 54,497 (101776) |
| Persons per room, mean (SD) | 0.81 (0.40) | 0.74 (0.32) | 0.84 (0.43) |
| Current household smoking, no. (%) | |||
| No | 3367 (74.24) | 913 (69.22) | 2454 (76.31) |
| Yes | 1168 (25.76) | 406 (30.78) | 762 (23.69) |
| Health insurance, no. (%) | |||
| Insured | 4332 (95.52) | 1249 (94.69) | 3083 (95.86) |
| Uninsured | 203 (4.48) | 70 (5.31) | 133 (4.14) |
NH = Neighborhood; HH = Household head; NL = Non-Latino; * N = 4533 due to missing data on NH poverty status.