TABLE 3

Baseline characteristics and serological results of the 72 patients with empyema and 78 controls

EmpyemaSPPECardiac effusions
Patients722949
Age years59 (43–72)68 (53–80)75 (67–82)
Male/female %49/2316/1334/15
Right/left %40/3217/1238/11
Symptom duration days10 (4–16)4 (2–6)35 (10–78)
Serum complement fixation testing
 Influenza all17 (24)2 (7)2 (4)
 Influenza A14 (20)1 (3)2 (4)
 Influenza B3 (4)1 (3)0 (0)
 RSV2 (3)2 (7)6 (12)
Age range of serology-positive patients years38–9041–8549–87

Data are presented as n, median (interquartile range) or n (%). SPPE: simple parapneumonic effusions; RSV: respiratory syncytial virus.