Table 1.
Evaluation of the test-retest reproducibility of the survey about adverse food reaction and food allergy according to Kappa concordance.
| Variable | Observed concordance | Kappa value (95% CI) |
|
|---|---|---|---|
| N | % | ||
| Age | 35 (35) | 100.0 | 1.00 (1.00-1.00) |
| Gender | 35 (35) | 100.0 | 1.00 (1.00-1.00) |
| Adverse food reactions | |||
| (A) Do you think your child has any health problems with any food? | 28 (35) | 80.0 | 0.64 (0.37–0.90) |
| (B) Which food do you think your child has any reaction to? | 30 (35) | 85.7 | 0.70 (0.47–0.94) |
| (C) Did the reaction take place the first time you gave your child this type of food? | 28 (35) | 80.0 | 0.55 (0.29–0.80) |
| (D1) How long after eating did it take for the reaction to occur (up to 2 hours)? | 27 (35) | 77.1 | 0.44 (0.14–0.73) |
| (D2) How long after eating did it take for the reaction to occur (more than 2 hours)? | 27 (35) | 77.1 | 0.49 (0.20–0.77) |
| (E1) Did anybody else eat the same food? | 28 (35) | 80.0 | 0.25 (−0.16–0.68) |
| (E2) Did someone else also have the same reaction upon food ingestion? | 31 (35) | 88.6 | 0.28 (−0.25–0.80) |
| (F) What was the reaction your child had after eating this food? | 30 (35) | 85.7 | 0.71 (0.47–0.94) |
| (G) Has your child had any reaction when this food only touched her skin? | 35 (35) | 100.0 | 1.00 (1.00-1.00) |
| (H) Was there any need to seek medical care in a hospital? | 31 (35) | 88.6 | 0.67 (0.40–0.93) |
| (I) Did your child have to be given any medicine in the hospital? | 29 (35) | 82.8 | 0.55 (0.24–0.87) |
| (J) Did your child have to take any medicine at home? | 28 (35) | 80.0 | 0.58 (0.28–0.88) |
| (L) After the reaction did your child eat the same food again? | 28 (35) | 80.0 | 0.65 (0.40–0.90) |
| (M) Did your child have the same reaction when she ate the same food again? | 32 (35) | 91.4 | 0.76 (0.55–0.98) |
| (N) Did your child have another reaction upon eating the same food again? | 31 (35) | 88.6 | −0.08 (−0.35–0.19) |
| (O) When was the last time your child had a reaction to this food? | 24 (35) | 68.6 | 0.28 (−0.04–0.62) |
| (P) Did your child stop eating the food after having a reaction? | 28 (35) | 80.0 | 0.60 (0.33–0.87) |
| (Q) Did your child feel itching, swelling, or numbness in his/her mouth after eating any fruit or raw vegetable? | 35 (35) | 100.0 | 1.00 (1.00-1.00) |
*The questions listed above were written in a language which made them understandable for the family members.