Table 2.

Multivariate regression analysis for the effect of serum lymphocyte % on pulmonary function.

	FEV1, %		FVC, %		FEV1/FVC, %
	Estimated mean (SE)	P value	Estimated mean (SE)	P value	Estimated mean (SE)	P value
Baseline lymphocyte, %
Lymphocyte, %	0.32 (0.09)	< 0.001	0.14 (0.09)	0.122	0.19 (0.06)	0.001
Lymphocyte groups
Normal lymphocytea	Reference		Reference		Reference
Low lymphocyteb	− 8.51 (6.60)	0.198	− 12.42 (9.37)	0.185	− 1.18 (4.19)	0.778
Clustered analysis
Lymphocyte, %	0.25 (0.08)	0.002	0.12 (0.09)	0.293	0.15 (0.05)	0.003
Lymphocyte groups
Normal lymphocytea	Reference		Reference		Reference
Low lymphocyteb	− 5.70 (1.71)	0.001	− 5.63 (1.98)	0.005	− 1.99 (1.21)	0.100

Adjusted for age, gender, body mass index, and smoking status (current or former).

FEV₁ forced expiratory volume in 1 s, FVC forced vital capacity, SE standard error.

^aNormal lymphocyte group was defined as those with serum lymphocyte percentage 20 to 51%.

^bLow lymphocyte group was defined as those with serum lymphocyte percentage < 20%.