Table 6.
Prediction of HRQL outcome by means of six CHQ-PF28 scales. Stepwise multiple linear regression analyses by means of the CHQ-PF28 scales PhS, PsS, PE, PT, FA and FC1.
| B Coeff. | (95% CI) | t | p-value | R Square | Adj. R Square | |
| Dependent variable: Child Physical Summary (PhS) | ||||||
| Independent variables: | ||||||
| Number of allergic diseases (0–3) | -3.262 | (-5.480 – -1.044) | -2.910 | 0.004 | ||
| Number of additional allergies/hypersensitivities (0–8) | -2.327 | (-3.692 – -0.962) | -3.373 | 0.001 | ||
| Male gender (0 = no, 1 = yes) | -4.633 | (-8.054 – -1.212) | -2.680 | 0.008 | ||
| Model summary | 0.324 | 0.308 | ||||
| Dependent variable: Child Psychosocial Summary (PsS) | ||||||
| Independent variable: | ||||||
| Food-induced breathing difficulties2 (0 = no, 1 = yes) | 4.501 | (1.297 – 7.705) | 2.779 | 0.006 | ||
| Sibling(s) with food hypersensitivity (0 = no, 1 = yes) | -3.994 | (-7.311 – -0.677) | -2.382 | 0.019 | ||
| Model summary | 0.106 | 0.093 | ||||
| Dependent variable: Parental impact – Emotional (PE) | ||||||
| Independent variables: | ||||||
| Number of allergic diseases (0–3) | -6.957 | (-10.264 – -3.651) | -4.162 | 0.000 | ||
| Food-induced gastro-intestinal symptoms (0 = no, 1 = yes) | -9.932 | (-16.426 – -3.438) | -3.026 | 0.003 | ||
| Model summary | 0.156 | 0.143 | ||||
| Dependent variable: Parental impact – Time (PT) | ||||||
| Independent variables: | ||||||
| Number of allergic diseases (0–3) | -5.852 | (-8.657 – -3.046) | -4.127 | 0.000 | ||
| Sibling(s) with food hypersensitivity (0 = no, 1 = yes) | -8.488 | (-14.321 – -2.656) | -2.879 | 0.005 | ||
| Model summary | 0.156 | 0.143 | ||||
| Dependent variable: Family impact – Activities (FA) | ||||||
| Independent variables: | ||||||
| Number of allergic diseases (0–3) | -6.465 | (-9.616 – -3.315) | -4.060 | 0.000 | ||
| Additional family member(s) with food hypersensitivity (0 = no, 1 = yes) | -6.653 | (-12.934 – -0.371) | -2.095 | 0.038 | ||
| Model summary | 0.137 | 0.124 | ||||
| Dependent variable: Family impact – Cohesion (FC) | ||||||
| Independent variable: | ||||||
| Food-induced breathing difficulties2 (0 = no, 1 = yes) | 11.363 | (2.661 – 20.064) | 2.583 | 0.011 | ||
| Model summary | 0.048 | 0.041 |
1CHQ-PF28 health scales: PhS = Physical Summary score; PsS = Psychosocial Summary score; PE = Parental impact-Emotional; PT = Parental impact-Time; FA = Family impact-Activities; FC = Family impact-Cohesion [28].
2Positive beta coefficients, shown in italics, indicate higher score means, i.e. higher HRQL, when the allergy-associated parameter food-induced breathing difficulties was present.