Although there appeared to be a direct relationship between vitamin D levels and FEV1 (regression coefficient=0.48; r 2 =0.03), it did not reach statistical significance ( P =0.07).
1
0.0700
0.0700
Although there appeared to be a direct relationship between vitamin D levels and FEV1 (regression coefficient=0.48; r 2 =0.03), it did not reach statistical significance ( P =0.07).