Skip to main content

Table 1 Baseline characteristics and aetiology per study of all 980 patients

From: Atypical aetiology in patients hospitalised with community-acquired pneumonia is associated with age, gender and season; a data-analysis on four Dutch cohorts

  All patients
(n = 980)
Meijvis [21]
(n = 304)
Endeman [23]
(n = 201)
Snijders [22]
(n = 213)
Vd Eerden [24]
(n = 262)
Demographic characteristics No. No. No. No. No.
 Male gender (%) 561 (57.2) 171 (56.3) 124 (61.7) 124 (58.2) 142 (54.2)
 Age in years, median (IQR) 67 (52–78) 66.5 (51–79) 68 (51.5–76) 65 (51.5–80) 68 (52–78)
 COPD (%) 236 (24.2) 34 (11.2) 64 (31.8) 43 (20.3) 95 (36.7)
 Smoking (%) 211 (28.6) 81 (29.2) a 56 (26.8) 74 (29.5)
 Nursing home resident (%) 29 (3.0) 16 (5.3) 3 (1.5) 4 (1.9) 6 (2.3)
 PSI class IV or V (%) 435 (44.4) 142 (46.7) 84 (41.8) 94 (44.1) 115 (43.9)
 30-Day mortality (%) 67 (6.8) 18 (5.9) 8 (4.0) 12 (5.6) 29 (11.1)
Aetiology (%)
 Streptococcus pneumoniae 282 (28.8) 64 (21.1) 60 (29.9) 78 (36.6) 80 (30.5)
 Haemophilus influenzae 55 (5.6) 9 (3.0) 18 (9.0) 7 (3.3) 21 (8.0)
 Legionella species 42 (4.3) 12 (3.9) 8 (4.0) 8 (3.8) 14 (5.3)
 Mycoplasma pneumoniae 31 (3.2) 5 (1.6) 4 (2.0) 13 (6.1) 9 (3.4)
 Coxiella burnetii 28 (2.9) 27 (8.9) 1 (0.5) 0 (0) 0 (0)
 Influenza A/B virus 25 (2.6) 7 (2.3) 6 (3.0) 3 (1.4) 9 (3.4)
 Staphylococcus aureus 21 (2.1) 3 (1.0) 6 (3.0) 2 (0.9) 10 (3.8)
 Chlamydia species 16 (1.6) 14 (4.6) 2 (1.0) 0 (0) 0 (0)
 Adenovirus 6 (0.6) 1 (0.3) 1 (0.5) 2 (0.9) 2 (0.8)
 Other bacteria 38 (3.9) 15 (4.9) 12 (6.0) 5 (2.3) 6 (2.3)
 Other viruses 21 (2.1) 11 (3.6) 9 (4.5) 0 (0) 1 (0.4)
 Unidentified 415 (42.3) 136 (44.7) 74 (36.8) 95 (44.6) 110 (42.0)
  1. Results are given as number and percentage, unless mentioned otherwise
  2. Abbreviations: COPD chronic obstructive pulmonary disease, ICU intensive care unit, IQR interquartile range, PSI pneumonia severity index
  3. aIndicates all missing values