Table 1.
Basic information of study participants, January 2013 to June 2017
| Participants (n = 3,987,573) |
P value* | |
|---|---|---|
| Sex distribution of population, n (%) | ||
| Male | 1,906,485 (47.81) | |
| Female | 2,081,088 (52.19) | |
| Urban–rural distribution of population, n (%) | ||
| Urban | 2,284,975 (57.30) | |
| Rural | 1,702,598 (42.70) | |
| Recruiting time (year), n (%) | ||
| 2013 | 3,017,631 (75.67) | |
| 2014 | 338,850 (8.50) | |
| 2015 | 332,129 (8.33) | |
| 2016 | 214,279 (5.37) | |
| 2017 | 84,684 (2.12) | |
| Case number of infectious diseases (incidence density, per 100,000 person–years) | ||
| Total | 106,289 (694.86) | < 0.0001 |
| Notifiable infections | 73,801 (482.47) | < 0.0001 |
| Non–notifiable infections | 32,488 (212.39) | < 0.0001 |
| Case number of five categories of infectious diseases (incidence density, per 100,000 person–years) | ||
| Respiratory | 61,951 (405.00) | < 0.0001 |
| Gastrointestinal | 9862 (64.47) | < 0.0001 |
| Vector–borne | 1128 (7.37) | < 0.0001 |
| Blood– and sexually transmitted | 10,170 (66.48) | < 0.0001 |
| Mucocutaneous | 23,178 (151.52) | < 0.0001 |
| Annual case number of infectious diseases (incidence density, per 100,000 person–years) | ||
| 2013 | 10,313 (364.81) | |
| 2014 | 12,813 (397.04) | |
| 2015 | 27,181 (771.20) | |
| 2016 | 35,167 (931.37) | |
| 2017 | 20,815 (1071.80) |
*Calculated by χ² test for trend from 2013 to 2017