Table 1 General characteristics of the study participants
From: Infantile allergic diseases: a cohort study prenatal fish intake and mercury exposure context
Mother’s | Total (n = 590) | Infant’s Allergic diseases: no (n = 395) | Infant’s Allergic diseases: yes (n = 195) | |
|---|---|---|---|---|
Age (years) | 30.2 ± 3.55 | 30.3 ± 3.63 | 29.9 ± 3.38 | |
|  | ≤ 30 | 349[59] | 225[57] | 124[64] |
|  | > 30 | 241[41] | 170[43] | 71[36] |
Educational level (years)* | ≤ 12 | 148[25] | 119[30] | 29[15] |
|  | > 12 | 436[75] | 273[70] | 163[85] |
Family Income (million KRW/month) | < = 2 | 153[26] | 103[26] | 50[26] |
|  | 2–6 | 319[54] | 212[54] | 107[55] |
|  | > 6 | 114[20] | 78[20] | 36[19] |
Parity* | 1 | 298[55] | 183[51] | 115[64] |
|  | > 1 | 242[45] | 178[49] | 64[36] |
Pre-pregnancy BMI |  | 21.83 ± 3.35 | 21.96 ± 3.29 | 21.59 ± 3.45 |
(kg/m2) | < 18.5 | 55[12] | 36[11] | 19[12] |
|  | 18.5–22.9 | 276[59] | 180[57] | 96[62] |
|  | ≥ 23 | 138[29] | 98[31] | 40[26] |
Total fish intake during pregnancy | < 1 | 274[46] | 178[45] | 96[49] |
(times/week) | ≥ 1 | 316 [54] | 217[55] | 99[51] |
White fish intake during pregnancy* | < 1 | 501[85] | 326[82] | 175[90] |
(times/week) | ≥ 1 | 89[15] | 69[18] | 20[10] |
Blue fish intake during pregnancy | < 1 | 523[88] | 346[87] | 177[91] |
(times/week) | ≥ 1 | 67[12] | 49[13] | 18[9] |
Shell fish intake during pregnancy | < 1 | 552[93] | 369[93] | 183[93] |
(times/week) | ≥ 1 | 38[7] | 26[7] | 12[7] |
Mother’s allergy history | No | 402[69] | 282[71] | 122[63] |
| Â | Yes | 186[31] | 113[29] | 73[37] |
Father’s allergy history | No | 439[74] | 306[77] | 133[68] |
| Â | Yes | 151[26] | 89[23] | 62[32] |
Child’s |  |  |  | |
Gestational age (weeks) |  | 39 ± 1.34 | 39 ± 1.42 | 39 ± 1.16 |
Birth weight (kg)* |  | 3.27 ± 0.40 | 3.24 ± 0.40 | 3.31 ± 0.40 |
Infant’s gender* | Boy | 307[52] | 194[49] | 113[58] |
| Â | Girl | 283[48] | 201[51] | 82[42] |