Table 1.
Sample characteristics*
| Total (n 2133) | % | Food intolerance | P | ||||
|---|---|---|---|---|---|---|---|
| No (n 1604) | % | Yes (n 529) | % | ||||
| Age | <0·01 | ||||||
| Median | 34 | 35 | 33 | ||||
| IQR | 28–44 | 28·5–44 | 27–42 | ||||
| Female | 1434 | 67·2 | 1060 | 66·1 | 374 | 70·7 | 0·05 |
| Race | <0·01 | ||||||
| Caucasian | 1583 | 74·2 | 1229 | 76·6 | 354 | 66·9 | |
| African American | 200 | 9·4 | 133 | 8·3 | 67 | 12·7 | |
| Asian | 174 | 8·2 | 120 | 7·5 | 54 | 10·2 | |
| Multiple races | 93 | 4·4 | 67 | 4·2 | 26 | 4·9 | |
| Other | 52 | 2·4 | 37 | 2·3 | 15 | 2·8 | |
| Prefer not to say | 31 | 1·5 | 18 | 1·1 | 13 | 2·5 | |
| Hispanic | 194 | 9·1 | 136 | 8·5 | 58 | 11·0 | 0·09 |
| Region | 0·17 | ||||||
| Midwest | 465 | 21·8 | 355 | 22·1 | 110 | 20·8 | |
| Northeast | 388 | 18·2 | 298 | 18·6 | 90 | 17·0 | |
| South | 855 | 40·1 | 649 | 40·5 | 206 | 38·9 | |
| West | 425 | 19·9 | 302 | 18·8 | 123 | 23·3 | |
| Born in USA | 1963 | 92·0 | 1476 | 92·0 | 487 | 92·1 | 0·98 |
| Number of prescription medications | <0·01 | ||||||
| 0 | 1095 | 51·3 | 857 | 53·4 | 238 | 45·0 | |
| 1–2 | 722 | 33·8 | 513 | 32·0 | 209 | 39·5 | |
| 3 or more | 316 | 14·8 | 234 | 14·6 | 82 | 15·5 | |
Bolded values emphasise those P-values that are statistically significant.
*
Data show n and % unless otherwise specified. Median and interquartile range (IQR) are reported for age due to the skewness of the distribution. P-values are derived based on the Wilcoxon rank sum test for age and the Pearson’s χ 2 test for other variables.