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Table 2 Analysis of M. pneumoniae positivity among patients during epidemic and post-epidemic by age groups. Data were represented as n (%) in total cases, and as n (positivity, %) in M. pneumoniae cases

From: Epidemiological characterization of respiratory tract infections caused by Mycoplasma pneumoniae during epidemic and post-epidemic periods in North China, from 2011 to 2016

Age group Total M. pneumoniae cases P value Epidemic P value Post-epidemic P value
Total M. pneumoniae cases Total M. pneumoniae cases
Infants 415 34 (8.2) <  0.001 246 30 (12.2) 0.801 169 4 (2.4) <  0.001
Toddlers 1172 127 (10.8) 768 113 (14.7) 404 14 (3.5)
Pre-school children 1048 182 (17.4) 671 136 (20.3) 377 46 (12.2)
School children 1348 443 (32.9) 849 325 (38.3) 499 118 (23.6)
Young adults 1260 237 (18.8) 677 182 (26.9) 583 55 (9.4)
Older adults 1254 74 (5.9) 432 59 (13.7) 822 15 (1.8)
The elderly 928 23 (2.5) 271 19 (7.0) 657 4 (0.6)
Very elderly 410 7 (1.7) 84 7 (8.3) 326 0 (0)
Total 7835 1127 (14.4)   3998 871 (21.8)   3837 256 (6.7)  
  1. P value: statistical analyses were performed on M. pneumoniae cases among age groups