Table 1

Characteristics of parapneumonic empyema-related hospitalisations in the USA, 1996–2008*

<18 years (n=26 125)18–39 years (n=22 185)40–64 years (n=62 358)≥65 years (n=46 375)All (n=157 094)
Age, years5.1 (5 to 5.3)30.7 (30.6 to 30.9)51.9 (51.8 to 52)76.7 (76.5 to 76.8)48.4 (47.5 to 49.4)
Female, %44.7 (43.4 to 46)30.2 (28.8 to 31.6)30.8 (30 to 31.7)40.1 (39.1 to 41.2)35.8 (35.2 to 36.4)
Race, %
 White42 (38.7 to 45.3)52 (49.8 to 54.3)56.7 (54.8 to 58.6)65.3 (63.3 to 67.2)56.1 (54.4 to 57.8)
 African-American11.4 (9.3 to 13.4)10.9 (9.7 to 12.1)9.7 (8.8 to 10.6)5.1 (4.5 to 5.7)8.8 (8.0 to 9.5)
 Hispanic13.1 (10.8 to 15.4)9.2 (8 to 10.4)5.9 (5.2 to 6.5)3.6 (3.1 to 4.1)6.9 (6.2 to 7.6)
 Asian or Pacific Islander3.7 (2.8 to 4.5)1.6 (1.2 to 2)1.4 (1.1 to 1.7)1.8 (1.4 to 2.2)1.9 (1.7 to 2.2)
 Native American0.8 (0.4 to 1.2)0.7 (0.3 to 1)0.4 (0.3 to 0.6)0.3 (0.1 to 0.4)0.5 (0.3 to 0.6)
 Other4.5 (3.6 to 5.4)2 (1.6 to 2.5)1.8 (1.5 to 2.1)1.5 (1.2 to 1.8)2.2 (1.9 to 2.5)
 Missing23.6 (18.5 to 28.6)24.1 (21.3 to 27.0)24.5 (22.2 to 26.9)23.0 (20.7 to 25.3)23.7 (21.7 to 25.7)
Length of stay, days11.8 (11.4 to 12.2)14.4 (14 to 14.8)15.6 (15.4 to 15.9)16.8 (16.4 to 17.1)15.2 (15.0 to 15.4)
Thoracentesis, %84.6 (82.7 to 86.5)91.3 (90.4 to 92.2)88.4 (87.7 to 89)81.6 (80.8 to 82.5)86.2 (85.6 to 86.7)
In-hospital case fatality, %0.4 (0.3 to 0.6)2.2 (1.8 to 2.7)5.2 (4.8 to 5.6)16.1 (15.3 to 16.9)7.2 (6.8 to 7.5)
  • * Numbers indicate percentages and 95% CIs unless otherwise specified. Numbers may not add to totals or 100% due to rounding/missing values.

  • Includes thoracentesis-related procedures (ICD9-CM: 34.04, 34.06, 34.09, 34.21, 34.51, 34.52, 34.91).