Table 4.

Comparison of baseline characteristics between urinary antigen test-positive and urinary antigen test-negative groups.

		Positive UAT (n = 248)	Negative UAT (n = 192)	p-Value
Male – no. (%)		159 (64.1)	134 (69.8)	0.210
Age – mean (SD)		66.22 (13.8)	65.99 (13.9)	0.867
Age – no. (%)				0.514
	19–50	30 (12.1)	29 (15.1)
	51–65	66 (26.6)	44 (22.9)
	>65	152 (61.3)	119 (62)
Prior antibiotic use, no. (%)		34 (13.7)	20 (10.4)	0.296
Bacteremia, no. (%)		12 (5.0)	5 (2.8)	0.269
30d mortality, no. (%)		19 (7.9)	11 (5.7)	0.380
CXR, no. (%)	Interstitial	87 (35.1)	76 (39.6)	0.332
	Lobar	72 (29.0)	34 (17.7)	0.006
	bronchopneumonia	89 (35.9)	82 (42.7)	0.145
C-reactive protein (mg/L)	mean(range)	134.35 (104.4)	108.53 (89.3)	0.007
Risk group, no. (%)				0.330
	Low	81 (32.7)	75 (39.1)
	Moderate	115 (46.4)	84 (43.8)
	High	52 (21.0)	33 (17.2)
CURB-65 score, no. (%)				0.275
	0–1	173 (69.8)	143 (74.5)
	2–5	75 (30.2)	49 (25.5)
Comorbidity, no. (%)	Splenectomy	0	0
	Hematologic malignancy	0	2 (1.0)	0.190
	Multiple myeloma	2 (0.5)	0	0.507
	Chemotherapy	30 (12.1)	16 (8.3)	0.201
	Chronic renal failure	2 (0.8)	1 (0.5)	1.000
	Nephrotic syndrome	1 (0.4)	1 (0.5)	1.000
	Transplantation	0	0
	Steroid	27 (10.9)	19 (9.9)	0.736
	HIV	1 (0.4)	0	1.000
	Diabetes	53 (21.4)	26 (13.5)	0.034
	Chronic liver disease	5 (2.0)	1 (0.5)	0.238
	Chronic pulmonary disease	45 (18.1)	45 (23.4)	0.172
	Chronic cardiovascular disease	17 (6.9)	8 (4.2)	0.227
	Smoking	59 (24.4)	53 (28.3)	0.354
	Alcohol	45 (18.5)	27 (14.4)	0.251
	Cerebrovascular disease	10 (4.0)	7 (3.6)	0.835
	Neurodegenerative disease	5 (2.0)	4 (2.1)	1.000
	Neuromuscular diseases	0	1 (0.5)	0.436
Complication, no. (%)	Empyema	0	1 (0.5)	0.436
	Lung abscess	0	0
	ARDS	2 (0.8)	0	0.507
	HUS	0	0

HIV, human immunodeficiency virus; ARDS, acute respiratory distress syndrome; HUS, hemolytic uremic syndrome.