| N | IRR | 95% CIs | P value | |
---|---|---|---|---|---|
Town of residence | |||||
 Brescia | 494 | 1.000 | – | – | – |
 Lecce | 428 | 0.600 | 0.414 | 0.871 | 0.007 |
 Perugia | 453 | 0.662 | 0.468 | 0.937 | 0.020 |
 Pisa | 334 | 0.829 | 0.593 | 1.160 | 0.275 |
 Torino | 430 | 0.647 | 0.448 | 0.933 | 0.020 |
 Temperature | 2139 | 0.952 | 0.944 | 0.961 | <0.001 |
 Children’s BMI* | 2139 | 1.030 | 1.009 | 1.052 | 0.005 |
Children’s adherence to Mediterranean diet* | |||||
 Low | 1876 | 1.000 | – | – | – |
 High | 263 | 0.824 | 0.683 | 0.994 | 0.043 |
Children’s exposure to second-hand smoke at home* | |||||
 No | 1864 | 1.000 | – | – | – |
 Yes | 275 | 1.199 | 1.017 | 1.415 | 0.031 |
Graduated mother* | |||||
 No | 1116 | 1.000 | – | – | – |
 Yes | 1022 | 0.862 | 0.756 | 0.983 | 0.026 |
Graduated father* | |||||
 No | 1265 | 1.000 | – | – | – |
 Yes | 846 | 0.864 | 0.754 | 0.990 | 0.035 |