Table 2 The overall proportion of LP of subgroups with different characteristics
|  |  | High prevalence regions n (LP%)) | Middle or low prevalence regions n (LP%) | P-value | 2010–2015 n (LP%) | 2016–2020 n (LP%) | P-value |
|---|---|---|---|---|---|---|---|
Age |  ≥ 50 | 23,968(66.02%) | 7390(54.07%) |  < 0.01* | 748 (46.52%) | 599 (33.92%) |  < 0.01* |
 < 50 | 32,681(43.60%) | 13,612(31.93%) |  < 0.01* | 2399 (25.28%) | 916 (18.36%) |  < 0.01* | |
Gender | Male | 41,858(52.14%) | 26,376(33.21%) |  < 0.01* | 6038 (30.85%) | 1484 (27.12%) |  < 0.01* |
Female | 13,399(48.79%) | 6150(32.00%) |  < 0.01* | 1310 (33.08%) | 528 (20.84%) |  < 0.01* | |
Marital status | Married | 33,244 (56.31%) | 17,332 (39.85%) |  < 0.01* | 3692 (40.71%) | 845 (24.80%) |  < 0.01* |
Others | 24,013 (44.46%) | 20,148 (30.60%) |  < 0.01* | 3808 (25.64%) | 1168(25.40%) | 0.743 | |
Infection routes | Heterosexual transmission | 49,465 (55.69%) | 25,685 (38.42%) | 0.627 | 4234(39.06%) | 1709(25.18%) |  < 0.01* |
MSM | 3942 (26.30%) | 10,489 (27.56%) |  < 0.01* | 2674(25.20%) | 224(24.72%) | 0.752 | |
Sample sources | Medical institutions | 35,956 (59.48%) | 26,472 (41.04%) |  < 0.01* | 4496(43.50%) | 1177(33.95%) |  < 0.01* |
Others | 21,300 (40.58%) | 10,239 (23.28%) |  < 0.01* | 2851 (21.60%) | 835 (18.81%) |  < 0.01* | |
Overall |  | 57,266(50.66%) | 43,041(36.21%) |  < 0.01* | 7615(31.70%) | 2012(25.13) |  < 0.01* |