Table 4. Thin-section CT findings for each type of pneumonia.

Finding	S. pneumoniae (n=86)		With H. influenzae (n=36)		p-value	With P. aeruginosa (n=26)		p-value	With MSSA (n=22)		p-value
Ground-glass attenuation	74	(86.0)	30	(83.3)	NS	26	(100)	NS	18	(81.8)	NS
Consolidation	65	(75.6)	26	(72.2)	NS	20	(76.9)	NS	16	(72.7)	NS
Bronchial wall thickening	22	(25.6)	34	(94.4)	<0.001	20	(76.9)	<0.001	18	(81.8)	<0.001
Centrilobular nodules	17	(19.8)	28	(77.8)	<0.001	20	(76.9)	<0.001	16	(72.7)	<0.001
Interlobular septal thickening	8	(9.3)	3	(8.3)	NS	2	(7.7)	NS	2	(9.1)	NS
Reticular opacity	8	(9.3)	6	(16.7)	NS	3	(11.5)	NS	3	(13.6)	NS
Nodules	7	(8.1)	5	(13.9)	NS	2	(7.7)	NS	3	(13.6)	NS
Bronchiectasis	2	(2.3)	7	(19.4)	<0.001	4	(15.4)	<0.01	3	(13.6)	<0.05
Cavity	0	(0)	1	(2.8)	NS	5	(19.2)	<0.001	0	(0)	NS
Pleural effusion	16	(18.6)	5	(13.9)	NS	16	(61.5)	<0.001	5	(22.7)	NS
Unilateral	11	(12.8)	2	(5.6)	NS	3	(11.5)	NS	2	(9.1)	NS
Bilateral	5	(5.8)	3	(8.3)	NS	13	(50.0)	<0.001	3	(13.6)	NS
Lymph node enlargement	13	(15.1)	4	(11.1)	NS	5	(19.2)	NS	4	(18.2)	NS
Distribution
Unilateral	51	(59.3)	19	(52.8)	NS	7	(26.9)	<0.005	7	(31.8)	<0.05
Bilateral	35	(40.7)	17	(47.2)	NS	19	(73.1)	<0.005	15	(68.2)	<0.05
Central	10	(11.6)	4	(11.1)	NS	2	(7.7)	NS	2	(9.1)	NS
Peripheral	43	(50.0)	20	(55.6)	NS	17	(65.4)	NS	8	(36.4)	NS
Upper	15	(17.4)	7	(19.4)	NS	4	(15.4)	NS	5	(22.7)	NS
Lower	35	(40.7)	17	(47.2)	NS	9	(34.6)	NS	10	(45.5)	NS

H., Haemophilus; MMSA, methicillin-susceptible Staphyloccus aureus; P., Pseudomonas; S., Streptococcus.

Data in parentheses are percentages.