TABLE 1

Baseline Characteristics of Cohort According to Self-reported Race

Total Sample (N = 1104)Black (n = 672)Hispanic (n = 248)White (n = 65)Other (n = 119)P
Outcome variables
    Food sensitization, n (%)393 (35.5)252 (37.5)83 (33.5)14 (21.5)43 (36.1).07
    No. of foods to which individual was sensitized, mean ± SD0.78 ± 1.370.85 ± 1.450.75 ± 1.390.4 ± 0.920.65 ± 1.02<.001
    Peanut sensitization, n (%)149 (13.4)106 (15.9)27 (11.0)6 (9.4)7 (5.9).009
    Milk sensitization, n (%)239 (21.9)154 (23.2)57 (23.4)5 (7.9)23 (19.5).04
    Egg sensitization, n (%)232 (21.4)141 (21.2)57 (23.7)7 (11.1)27 (22.9).18
Descriptive variables
    Preterm birth, n (%)314 (28.4)191 (28.4)73 (29.4)19 (29.2)31 (26.1).92
    Maternal postnatal smoking, n (%)172 (15.6)105 (15.6)28 (11.3)27 (41.5)12 (10.1)<.0001
    Prenatal smoke exposure, n (%)111 (10.1)64 (9.5)14 (5.7)24 (36.9)9 (7.6)<.0001
    Female, n (%)547 (49.6)332 (49.4)123 (49.6)37 (56.9)55 (46.2).58
    Child's age, mean ± SD, y2.65 ± 2.232.82 ± 2.322.36 ± 2.042.49 ± 2.392.42 ± 1.98.03
    Mother's age at delivery, mean ± SD, y28.5 ± 6.5428.88 ± 6.6927.25 ± 6.0729.03 ± 5.6528.69 ± 6.88.10
    Maternal atopy, n (%)393 (35.6)248 (37.1)81 (32.7)28 (43.1)35 (29.4).16
    Cesarean section delivery, n (%)366 (33.1)221 (32.9)83 (33.5)23 (35.4)39 (32.7).98
    Firstborn child, n (%)450 (40.8)273 (40.6)96 (38.7)41 (63.1)40 (33.6).001
    Exclusive breastfeeding, n (%)62 (5.6)29 (4.3)19 (7.7)5 (7.7)9 (7.6).14
    Mother's highest level of education, n (%)
        Less than high school355 (30.3)169 (25.2)114 (46.0)13 (20.0)39 (32.8)
        High school404 (36.6)263 (39.1)76 (30.7)23 (35.4)42 (35.3)
        Some college365 (33.1)240 (35.7)58 (23.4)29 (44.6)38 (31.9)<.0001
    Annual household income, n (%)
        Less than $30 000538 (48.7)336 (50.0)123 (49.6)27 (41.5)52 (43.7)
        At least $30 000337 (30.5)197 (29.3)66 (26.6)31 (47.7)43 (36.1)
        Unknown229 (20.7)139 (20.7)59 (23.8)7 (10.8)24 (20.2).02
Ancestry, median (interquartile range), %
    European14.7 (0.4–46.8)6.9 (2.2–14.5)50.9 (40.3–62.1)94.9 (82.3–98.8)34.0 (5.6–51.3)<.0001
    African77.7 (39.4–88.8)83.0 (78.5–93.3)21.7 (7.7–43.2)1.1 (0.6–8.2)58.2 (39.7–86.1)<.0001
    Asian5.1 (2.5–10.9)4.4 (2.2–8.3)14.8 (5.5–39.3)2.6 (1.3–7.7)4.1 (2.5–8.6)<.0001
  • All P values represent differences according to race. P values for categorical variables were determined with χ2 statistics. All P values for continuous variables were determined with analyses of variance.