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Table 2 Description of the population : age, gender, medical history and smoking status

From: Pontiac fever: an operational definition for epidemiological studies

  Sample size Mean age (standard-error) Previous pathologies Previous immunity conditions Previous respiratory conditions Current smokers Past smokers
Male 158 (28.2%) 77 (± 9) 117 (74.0%) 37 (23.4%) 20 (12.6%) 20 (12.7%) 27 (17.1%)
Female 402 (71.9%) 82 (± 9) 290 (72.1%) 94 (24,3%) 54 (13.4%) 22 (5.5%) 41 (10.2%)
Total 560 (100%) 81 (± 9) 407 (72.7%) 131 (23.4%) 74 (13.2%) 42 (7.5%) 68 (12.1%)