Table 5 DIF identification and parameter estimates for specific items measuring HRQoL for adolescent self-reports and parent proxy-reports by weight categories
| Â | Domains and DIF items | Estimate | Standard error | P-value |
|---|---|---|---|---|
Adolescent self-reports | Â | Â | Â | |
 Overweight & obese vs. normal weight (reference group) |  |  |  | |
  Emotional functioning |  |  |  | |
   Item 9 (feeling afraid/scared) | 0.18 | 0.09 | 0.046 | |
   Item 10 (feeling sad/blue) | −0.20 | 0.10 | 0.046 | |
 Obese vs. normal weight (reference group) |  |  |  | |
 Emotional functioning |  |  |  | |
   Item 9 (feeling afraid/scared) | 0.28 | 0.10 | 0.007 | |
   Item 10 (feeling sad/blue) | −0.27 | 0.12 | 0.020 | |
 Obese vs. overweight (reference group) |  |  |  | |
  Emotional functioning |  |  |  | |
   Item 9 (feeling afraid/scared) | 0.30 | 0.14 | 0.031 | |
Parent proxy-reports | Â | Â | Â | |
 Overweight & obese vs. normal weight (reference group) |  |  |  | |
  Emotional functioning |  |  |  | |
   Item 9 (feeling afraid/scared) | −0.28 | 0.12 | 0.015 | |
  Social functioning |  |  |  | |
   Item 15 (other teens not wanting to be his/her friend) | −0.28 | 0.12 | 0.019 | |
 Overweight vs. normal weight (reference group) |  |  |  | |
  Emotional functioning |  |  |  | |
   Item 11 (feeling angry) | 0.35 | 0.16 | 0.031 | |
  Social functioning |  |  |  | |
   Item 16 (getting teased by other teens) | 0.39 | 0.19 | 0.039 | |
 Obese vs. normal weight (reference group) |  |  |  | |
  Physical functioning |  |  |  | |
   Item 4 (lifting something heavy) | −0.30 | 0.15 | 0.047 | |
  Emotional functioning |  |  |  | |
   Item 9 (feeling afraid/scared) | −0.35 | 0.13 | 0.007 | |
 Obese vs. overweight (reference) |  |  |  | |
  Social functioning |  |  |  | |
   Item 16 (getting teased by other teens) | −0.45 | 0.19 | 0.011 | |