TABLE 1.
Descriptive Statistics and Percent Frequency of pFA for Total, New pFA, and High-Risk Groups
| Variable | Total Groupa (n = 1363) | High-Risk Groupc (n = 823) | |||
|---|---|---|---|---|---|
| n (%) | % pFA | % New pFAb | n (%) | % pFA | |
| pFA | 89 | 7.0 | 5.2 (n = 71) | 79 | 9.6 |
| Mother’s education | |||||
| High school | 180 (13.2) | 2.7 | 1.7 | 101 (12.3) | 5.0 |
| Associate degree | 174 (12.8) | 6.1 | 4.6 | 95 (11.5) | 9.5 |
| Some college | 348 (25.5) | 5.4 | 6.8 | 204 (24.8) | 7.8 |
| Bachelor | 470 (34.5) | 8.7 | 6.8 | 300 (36.4) | 12.7 |
| Postgraduate | 191 (14.0) | 6.8 | 4.6 | 123 (15.0) | 8.9 |
| Race | |||||
| Non-Hispanic white | 1177 (86.4) | 6.5 | 5.3 | 708 (86.0) | 9.5 |
| Non-Hispanic Asian | 26 (1.9) | 7.7 | 7.7 | 15 (1.8) | 13.3 |
| Non-Hispanic black | 53 (3.9) | 5.7 | 3.8 | 35 (4.2) | 8.6 |
| Hispanic | 77 (5.6) | 7.7 | 6.5 | 42 (5.1) | 14.3 |
| Non-Hispanic other | 30 (2.2) | 3.3 | 23 (2.8) | 4.3 | |
| Income/percent federal poverty level | |||||
| <185% | 529 (38.8) | 4.3 | 2.4 | 319 (38.8) | 6.6 |
| ≥185% | 834 (61.2) | 7.9 | 7.0 | 504 (61.2) | 11.5 |
| Child’s gender | |||||
| Female | 675 (49.5) | 5.6 | 4.6 | 394 (47.9) | 8.1 |
| Male | 688 (50.5) | 7.4 | 5.8 | 429 (52.1) | 11.0 |
| Parity | |||||
| No sibling | 142 (10.4) | 9.2 | 8.4 | 85 (10.3) | 14.1 |
| 1 sibling | 555 (40.7) | 7.0 | 5.9 | 325 (39.5) | 9.5 |
| ≥2 siblings | 666 (48.9) | 5.6 | 3.9 | 413 (50.2) | 8.7 |
| Type of delivery | |||||
| Vaginal | 959 (70.4) | 5.8 | 4.7 | 592 (71.9) | 8.4 |
| Cesarean | 404 (29.6) | 8.2 | 6.4 | 231 (28.1) | 12.6 |
| Family history of food allergy | |||||
| No | 1053 (77.3) | 5.6 | 4.6 | 513 (62.3) | 9.6 |
| Yes | 310 (22.7) | 10.0 | 7.4 | 310 (37.7) | 9.7 |
| Family history of other atopy | |||||
| No | 764 (56.0) | 5.2 | 5.0 | 224 (27.2) | 13.4 |
| Yes | 599 (44.0) | 8.2 | 5.5 | 599 (72.8) | 8.2 |
| Reported eczema before age 1 y | |||||
| No | 1082 (79.4) | 4.3 | 3.6 | 542 (65.9) | 6.8 |
| Yes | 281 (20.6) | 15.0 | 11.4 | 281 (34.1) | 15.0 |
| Maternal tobacco smoke exposure | |||||
| No | 1162 (85.2) | 6.4 | 5.2 | 700 (85.0) | 9.1 |
| Yes | 201 (14.8) | 7.5 | 5.0 | 123 (15.0) | 12.2 |
| Other tobacco smoke exposure in home | |||||
| No | 1189 (87.2) | 6.5 | 5.2 | 725 (88.1) | 9.2 |
| Yes | 174 (12.8) | 6.9 | 5.2 | 98 (11.9) | 12.2 |
| Exclusive breastfeeding duration | |||||
| 0 mo | 590 (43.3) | 7.4 | 6.1 | 345 (41.9) | 11.3 |
| 1–3 mo | 411 (30.2) | 5.8 | 5.1 | 249 (30.3) | 8.4 |
| ≥ 4 mo | 362 (26.5) | 5.8 | 3.9 | 229 (27.8) | 8.3 |
| Complementary food introduction by age of infant | |||||
| 1–3 mo | 461 (33.8) | 7.4 | 5.6 | 288 (35.0) | 11.1 |
| 4–5 mo | 542 (39.8) | 6.3 | 5.4 | 322 (39.1) | 8.7 |
| 6–12 mo | 236 (17.3) | 6.8 | 4.6 | 141 (17.1) | 10.6 |
| Not reportedd | 124 (9.1) | 4.0 | 4.0 | 72 (8.8) | 5.6 |
a
Includes all Y6FU children included in the logistic regression analysis.
b
Includes children within the total group who had pFA at age 6 years but did not have pFA at age 1 year.
c
Includes subset of total group children with any of the following: family history of food allergy, family history of other atopy, or reported eczema before 1 year of age.
d
Includes children not reported to have complementary foods introduced during the IFPS II year 1 survey.