Volume 21, Number 6—June 2015
Dispatch
Pneumonia Outbreak Caused by Chlamydophila pneumoniae among US Air Force Academy Cadets, Colorado, USA
Table 1
Group | Men, no. (%) | Women, no. (%) | No. cases | Total population | Attack rate, % | p value by χ2 test of homogeneity |
---|---|---|---|---|---|---|
Class, y | ||||||
Senior, 2014 | 12 (71) | 5 (29) | 17 | 1,131 | 1.5 | 0.01† |
Junior, 2015 | 23 (77) | 7 (23) | 30 | 884 | 3.4 | |
Sophomore, 2016 | 14 (70) | 6 (30) | 20 | 886 | 2.3 | |
Freshman, 2017 | 25 (71) | 10 (29) | 35 | 1,025 | 3.4 | |
Cadet group | ||||||
1 | 17 (77) | 5 (23) | 22 | 972 | 2.3 | 0.45‡ |
2 | 18 (78) | 5 (22) | 23 | 962 | 2.4 | |
3 | 26 (79) | 7 (21) | 33 | 1,002 | 3.3 | |
4 | 13 (54) | 11 (46) | 24 | 990 | 2.4 |
*Group 1, squadron 1–10; group 2, squadron 11–20; group 3, squadron 21–30; group 4, squadron 31–40.
†Probability of random distribution among class years.
‡Probability of random distribution among cadet groups.
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Page updated: May 15, 2015
Page reviewed: May 15, 2015
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