Table 1.

Clinical characteristics of pSS with lung cancer and pSS patient groups

Variable	pSS with lung cancer group	pSS group	P † value
Female: male	8:2	20:1	0.226
Age (year)	60.8 ± 8.9	44.9 ± 12.1	<0.001 ‡
Organ involvement
Xerostomia	100%	79.5%	0.247
Keratoconjunctivitis sicca	100%	58.0%	0.024
Hematologic involvement	30%	52.6%	0.306
Liver function abnormality	20%	19.4%	1.00
Diffuse parenchymal lung disease	50%	60.0%	0.772

^†P-value in χ² test.

^‡P-value in Student's t-test.

pSS, Primary Sjogren's syndrome.