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Table 3 Characteristic analysis on M. pneumoniae cases during epidemic and post-epidemic. 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

Characteristic Epidemic Post-epidemic
Total M. pneumoniae cases P value Total M. pneumoniae cases P value
Age, median (IQR) 9 (30) 11 (20)   39 (58) 10 (19)  
 Children 2534 (63.4) 604 (23.8) <  0.001 1449 (37.8) 182 (12.6) < 0.001
 Adults 1464 (36.6) 267 (18.2) 2388 (62.2) 74 (3.1)
Gender    0.145    0.102
 Female 1889 (47.2) 431 (22.8)   1625 (42.4) 121 (7.4)  
 Male 2109 (52.8) 440 (20.9)   2212 (57.6) 135 (6.1)  
Sample types    0.39    < 0.001
 Oropharyngeal swab 3265 (81.7) 705 (21.6)   1931 (50.3) 178 (9.2)  
 Sputum 675 (16.9) 151 (22.4)   1615 (42.1) 74 (4.6)  
 Balf a 54 (1.4) 15 (27.8)   278 (7.2) 4 (1.4)  
 Others 4 (0.1) 0 (0)   13 (0.4) 0 (0)  
Site of care    0.581    < 0.001
 Outpatients 2041 (51.1) 431 (21.1)   1386 (36.1) 100 (7.2)  
 Wards 1807 (45.2) 426 (23.6)   1964 (51.2) 156 (7.9)  
 RICU and EICU 96 (2.4) 11 (11.5)   261 (6.8) 0 (0)  
 Other ICUs 54 (1.4) 3 (5.6)   226 (5.9) 0 (0)  
  1. aBalf: bronchoalveolar lavage fluid
  2. P value: statistical analyses were performed within M. pneumoniae cases