Table 1. The underlying diseases and presenting symptoms in 363 patients.

Characteristics	S. pneumoniae (n=122)		S.pneumoniae with concurrent infections (n=241)		p-value
Smoking habit	38 (31.1)		101 (41.9)		<0.05
Pulmonary emphysema	23 (18.9)		54 (22.4)		NS
Malignancy	23 (18.9)		80 (33.2)		<0.01
Cardiac disease	20 (16.4)		50 (20.7)		NS
Alcoholic	17 (13.9)		71 (29.5)		<0.01
Diabetes mellitus	16 (13.1)		51 (21.2)		NS
Asthma	8 (6.6)		33 (13.7)		<0.05
Liver disorder	8 (6.6)		28 (11.6)		NS
Collagen disease	2 (1.6)		21 (8.7)		<0.01
Presenting symptoms
Cough	104 (85.2)		187 (77.6)		NS
Sputum	79 (64.8)		222 (92.1)		<0.001
Fever	108 (88.5)		199 (82.6)		NS
Dyspnoea	20 (16.4)		30 (12.4)		NS
Delirium	7 (5.7)		13 (5.4)		NS

NS, not significant.

Data in parentheses are percentages.