Table 1. Occurrence of IgE-Mediated Allergy Among 605 Children Undergoing Surgery for Appendicitis.
| Characteristic | Patient Group | P Value | |
|---|---|---|---|
| Allergy (n = 102) | No Allergy (n = 503) | ||
| Age, median (IQR), y | 11 (9-13) | 10 (7-12) | .002a |
| Sex, No. (%) | |||
| Boys | 66 (64.7) | 315 (62.6) | .74b |
| Girls | 36 (35.3) | 188 (37.4) | |
| Duration of symptoms, median (IQR), d | 1 (<1 to 1) | 1 (<1 to 2) | .06a |
| Appendicolith present, No. (%) | 10 (9.8) | 88 (17.5) | .06b |
| No. of primary care visits within last 12 mo, median (IQR)c | 0.5 (0-1) | 0 (0-2) | .61a |
| Season, No. (%) | |||
| Spring | 32 (31.4) | 143 (28.4) | .59b |
| Summer | 25 (24.5) | 103 (20.5) | |
| Autumn | 23 (22.5) | 123 (24.5) | |
| Winter | 22 (21.6) | 134 (26.6) | |
Abbreviation: IQR, interquartile range.
a
Calculated using the Mann-Whitney test.
b
Calculated using the Fisher exact test.
c
Data were available for 95 patients (2015-2016).