Table 3.

Univariate correlation between correlation lymphocytes, CD8 + T cells and clinical characteristic

Variables	Lymphocytes		CD8 + T-cells		CD4 + T-cells
	r	P-value	r	P-value	r	P-value
Gender (1 = male, 2 = female)	-0.244	0.022*	0.110	0.531	-0.110	0.531
BMI	-0.134	0.212	0.110	0.529	-0.110	0.529
APGAR, 1 min	-0.337	0.002**	-0.469	0.008**	0.469	0.008**
APGAR, 5 min	-0.227	0.043*	-0.574	0.007**	0.574	0.007**
Gestational age,	-0.348	< 0.001**	-0.436	0.010*	0.436	0.010*
BPD severity	0.240	0.121	0.475	0.034*	-0.475	0.034*
Birth weight, gram	-0.363	< 0.001**	-0.452	0.007**	0.452	0.007**
Post FEV1 Z-score	-0.199	0.065	-0.45	0.007**	0.45	0.007**
Post FVC Z-score	-0.213	0.048*	-0.281	0.102	0.281	0.102
Post FEV1/FVC Z-score	-0.037	0.735	-0.351	0.039*	0.351	0.039*
Post FEV1%, predicted	-0.187	0.083	-0.468	0.005**	0.468	0.005**
Post FVC %, predicted	-0.144	0.182	-0.290	0.091	0.290	0.091
Post_FEV1FVC	-0.094	0.386	-0.329	0.054	0.329	0.054
FeNO, ppb	0.244	0.022*	0.022	0.898	-0.022	0.898
DLCO (% pred)	-0.124	0.253	-0.527	0.001**	0.527	0.001**
RV/TLC	0.134	0.219	0.511	0.002**	-0.511	0.002**

Note: BPD: bronchopulmonary dysplasia; BMI: body mass index; FEV₁: forced expiratory volume in 1 s; FVC: forced vital capacity; DLCO: diffusing capacity of the lung for carbon monoxide; RV: residual volume; TLC: total lung capacity; FeNO: fractional exhaled nitric oxide; APGAR: Apgar-score; Post: post bronchodilator; BMI: body mass index; APGAR: Apgar-score. *: P < 0.05; **: P < 0.01