Table 2.

Comparison of patients with and without pneumococcal vaccination

	Pneumococcal vaccination (+) (n=63)	Pneumococcal vaccination (–) (n=79)	P
Age, years	76 (65–91)	76 (66–99)	0.990
Sex (female:male)	33:30	31:48	0.130
Smoking history (never/past+current)	31/32	31/48	0.307
Comorbidities
Chronic respiratory disease	26 (41.3%)	9 (11.5%)	<0.001
Cardiovascular disease	15 (23.8%)	12 (15.2%)	0.205
Collagen vascular disease	1 (1.6%)	4 (5.1%)	0.382
Diabetes	11 (17.5%)	13 (16.5%)	1.000
Active malignancy	3 (4.8%)	2 (2.5%)	0.655
Regularly visiting clinics and/or hospitals for:
Any disease	56 (88.9%)	71 (89.9%)	1.000
Internal disease	51 (81%)	67 (84.8%)	0.653
Use of systemic steroid and/or immunosuppressant	0 (0%)	5 (6.3%)	0.066
Receipt of PPSV23 notice from municipality	59 (93.7%)	51 (64.6%)	<0.001
Reason for visiting our hospital (radiographic abnormality a)	26 (41.3%)	36 (45.6%)	0.615

Data are presented as median (range) or number of patients (%).

^a From annual lung cancer screening or medical check