Table 4. The association between the variable pain categories and school grades.
| Difference in school grades between those with symptoms and the symptom free Estimated difference (95% CI) |
||||||
|---|---|---|---|---|---|---|
| Girls | Boys | |||||
| Only headache | Only abdominal pain | Headache and abdominal pain | Only headache | Only abdominal pain | Headache and abdominal pain | |
| 10% percentile | ||||||
| Model 1a | -12 (-12.9 ; -10.7) | -27 (-28.2 ; -25.0) | -58 (-59.6 ; -57.1) | -17 (-18.8 ; -16.0) | -5 (-6.9 ; -3.0) | -94 (-95.6 ; -92.4) |
| Model 2b | -8 (-9.6 ; -6.7) | -22 (-24.6 ; -20.3) | -50 (-52.2 ; -48.7) | -20 (-21.4 ; -18.1) | -7 (-9.5 ; -4.8) | -88 (-90.3 ; -86.5) |
| 50% percentile | ||||||
| Model 1a | -13 (14.2 ; -12.2) | -18 (-19.5 ; -16.5) | -34 (-35.7 ; -33.0) | -16 (-17.6 ; -14.8) | -5 (-7.0 ; -3.2) | -24 (-26.4 ; -21.7) |
| Model 2b | -13 (-13.7 ; -11.5) | -16 (-17.4 ; -14.0) | -32 (-34.1 ; -31.0) | -15 (-16.2 ; -13.5) | -7 (-8.6 ; -4.8) | -25 (27.3 ; -22.5) |
| 90% percentile | ||||||
| Model 1a | -9 (-9.4 ; -7.8) | -10 (-11.5 ; -9.0) | -19 (-20.3 ; -17.9) | -17 (-18.7 ; -15.8)) | -7 (-8.5 ; -4.9) | -25 (-27.6 ; 22.3) |
| Model 2 | -10 (-11.2 ; -9.4) | -11 (-12.3 ; -9.5) | -21 (-22.8 ; -20.0) | -16 (-17.3 ; -14.2) | -5 (-6.9 ; -3.0) | -26 (-29.0 ; -23.2) |
The association is investigated with a quantile regression, using data from both cohorts, 2000 and 2008, in 10% percentile, 50% percentile and in 90% percentile of school grades.
a Model 1 is adjusted for year (2000 and 2008), parental education and foreign origin. NGirls = 9889, NBoys = 9685.
b Model 2 is adjusted as model 1 and in addition also for sedentary behavior. NGirls = 9781, NBoys = 9595.