Table 6. Mean PFT values according to vitamin D.

Vitamin D	Mean PFT value	N	P value
>50 nmol/l	FEV1 62,80%	25	P = 0.036
<50 nmol/l	FEV1 53,87%	127
>50 nmol/l	FVC 86,72%	25	P = 0.024
<50 nmol/l	FVC 76,83%	127
>50 nmol/l	FEV1/FVC 0,56	25	P = 0.15
<50 nmol/l	FEV1/FVC 0,54	127
>50 nmol/l	FEV6 80,00%	25	P = 0.026
<50 nmol/l	FEV6 71,11%	127
>50 nmol/l	FEV1/FEV6 0,61	25	P = 0.163
<50 nmol/l	FEV1/FEV6 0,58	127
>50 nmol/l	PEF 63,48%	25	P = 0.055
<50 nmol/l	PEF 54,39%	127
>50 nmol/l	FEF2575 49,00%	25	P = 0.005
<50 nmol/l	FEF2575 37,52%	127
>50 nmol/l	FEV3 73,40%	25	P = 0.032
<50 nmol/l	FEV3 64,47%	127
>50 nmol/l	FEV3/FVC 0,84	25	P = 0.18
<50 nmol/l	FEV3/FVC 0,82	127