Table 5.

Observational associations of BMI with FEV1/FVC and FEF2575 in predictive and in long-term cross-sectional models.

	N	β1,${\beta }_{\text{c1}},{\beta }_{\text{c2}}$	SE	p-value
FEV1/FVC
Predictive model
BMI main effect log(BMIs1s2) → FEV1/FVCs2,s3	2,853	−0.006	0.025	0.803
BMI*Age interaction effect log(BMIs1s2):Ages1s2 → FEV1/FVCs2,s3		0.001	0.001	0.378
Long-term cross-sectional model
BMI main effect log(BMIs1s2s3) → FEV1/FVCs1,s2,s3	2,731	−0.047	0.026	0.076
BMI*Age interaction effect log(BMIs1s2s3):Ages1, s2,s3 → FEV1/FVCs1, s2, s3		0.001	0.001	0.179
FEF2575
Predictive model
BMI main effect log(BMIs1s2) → FEF2575s2,s3		0.746	0.330	0.024
BMI*Age interaction effect log(BMIs1s2):Ages1s2 → FEF2575s2,s3	2,850	−0.019	0.011	0.085
Long-term cross-sectional model
BMI main effect log(BMIs1,s2,s3) → FEF2575s1,s2,s3		0.525	0.375	0.162
BMI*Age interaction effect log(BMIs1,s2,s3):Ages1,s2,s3 → FEF2575s1, s2, s3	2,728	−0.017	0.011	0.114

^a${\beta }_{\mathit{\text{c1}}}$, associational BMI main effect; β₂, associational BMI^*Age interaction effect.