Table 1.
Clinical and demographic characteristics of nested study and INSPIRE cohort.
| With 1-year plasma samplea N (%) |
Without 1-year plasma sample N (%) |
Total INSPIRE cohort N (%) |
|
|---|---|---|---|
| Sample size | 237 | 1709 | 1946 |
| Infant sex | |||
| Male | 135 (57) | 884 (52) | 1019 (52) |
| Female | 102 (43) | 825 (48) | 927 (48) |
| Infant race/ethnicity | |||
| Non-Hispanic White | 163 (69) | 1104 (65) | 1267 (65) |
| Non-Hispanic Black | 40 (17) | 303 (18) | 343 (18) |
| Hispanic | 19 (8) | 151 (9) | 170 (9) |
| Other | 15 (6) | 151 (9) | 166 (9) |
| Gestational age (weeks)b | 39 (39–40) | 39 (39–40) | 39 (39–40) |
| Birthweight (grams)b | 3405 (3178–3774) | 3405 (3093–3717) | 3405 (3120–3740) |
| Mode of delivery | |||
| Vaginal | 172 (73) | 1163 (68) | 1335 (69) |
| Cesarean | 65 (27) | 546 (32) | 611 (31) |
| Insurance | |||
| Medicaid | 111 (47) | 944 (55) | 1055 (54) |
| Private | 124 (52) | 743 (43) | 867 (45) |
| Self pay | 0 (0) | 12 (1) | 12 (1) |
| Unknown | 0 (0) | 2 (0) | 2 (0) |
| Other | 2 (1) | 8 (0) | 10 (1) |
| Maternal smoking during pregnancy | 36 (15) | 314 (18) | 350 (18) |
| Secondhand smoke exposure at enrollment | 97 (41) | 814 (48) | 911 (47) |
| Maternal asthma | 48 (20) | 331 (19) | 379 (19) |
| Body mass index at one year | 17 (16–19) | 17 (16–18) | 17 (16–18) |
a
Clinical and demographic characteristics did not differ between children with and without 1-year plasma sample.
a
Data expressed as median (interquartile range).
Variables may contain missing data.