TABLE 1.
Demographic and birth‐related characteristics in the sample (n = 3728)
| Total sample (n = 3728) | ARFID (n = 49) | No ARFID (n = 3679) | |
|---|---|---|---|
| Characteristic | % | ||
| Sex, % female | 49.1 | 55.1 | 49.0 |
| Age in months cross‐sectional follow‐up, mean (SD), median (range) | 68.1 (11.0), 67 (49–95) | 67.7 (12.3), 66 (50–88) | 68.1 (11.0), 67 (49–95) |
| Gestational age at birth in weeks, % | |||
| Total, mean (SD) | 39.1 (1.7) | 39.3 (1.5) | 39.1 (1.6) |
| Preterm births (<37) | 5.3 | 4.1 | 5.3 |
| Term births (37–41) | 94.3 | 95.9 | 94.3 |
| Post term births (≥42) | 0.4 | 0.0 | 0.4 |
| Birth weight in g, mean (SD) | 2987 (414) | 2928 (457) | 2987 (413) |
| Multiple births, % | 1.3 | 2.0 | 1.3 |
| Apgar score <7 at 1 min after birth, % | 2.5 | 2.1 | 2.5 |
| Apgar score <7 at 5 min after birth, % | 0.8 | 0.0 | 0.8 |
| Maternal age at study entry (during trimester 1), % | |||
| Total, mean (SD) | 31.2 (4.7) | 31.7 (5.0) | 31.2 (4.7) |
| <25 | 7.3 | 6.1 | 7.3 |
| 25–29 | 29.9 | 28.6 | 30.0 |
| 30–34 | 37.1 | 34.7 | 37.0 |
| ≥35 | 25.7 | 30.6 | 25.7 |
| Maternal education in years, % | |||
| <10 | 3.1 | 6.4 | 3.1 |
| 10–12 | 23.3 | 23.4 | 23.3 |
| 13–16 | 71.9 | 68.1 | 71.9 |
| ≥17 | 1.7 | 2.1 | 1.7 |
| Annual household income in million Japanese Yen, % | |||
| <2 | 7.5 | 6.5 | 7.5 |
| 2 to <4 | 33.6 | 41.3 | 33.5 |
| 4 to <6 | 33.0 | 28.3 | 33.0 |
| 6 to <8 | 18.0 | 19.6 | 18.0 |
| 8 to <10 | 5.2 | 4.4 | 5.2 |
| ≥10 | 2.8 | 0.0 | 2.9 |
| Any person smoking in the household, % | 19.9 | 30.6 | 19.7 |
Note: Differences between groups were tested with chi square tests for categorical outcomes (sex, preterm/term/post term birth, multiple birth, Apgar score < 7 at 1 and 5 min, maternal age in groups, maternal education, annual household income, smoking in the household), and Welch's t‐tests for continuous outcomes (age, gestational age, birth weight, maternal age). All p‐values were >0.3, except for smoking in the household (p = 0.06).