The Use of a Novel Quantitative Marker of Echogenicity of Pleural Fluid in Parapneumonic Pleural Effusions

Table 1

Demographic and clinical characteristics of the study population. Data are expressed as mean ± SD or as absolute numbers. PPE, parapneumonic effusion; M/F, male/female; NA, not applicable; NS, not significant.

Parameter	Uncomplicated PPE	Complicated PPE	value
Subjects number	11	13	NA
Age (years)	65.71 ± 21.18	50.18 ± 15.56	NS
Type of effusion (transudate/exudate)	0/11	0/13	NS
Duration of chest tube placement (days)	0	8.67 ± 10.39	<0.001
Days to afebrile	1.16 ± 0.98	7.60 ± 4.73	0.009
Days of hospitalization	6.12 ± 1.95	14.81 ± 9.18	0.003