Table 1.
Basic characteristics and hepatitis B viral infection outcomes by birth cohorts.
| Characteristics or outcomes* | Birth year |
P values | |||
|---|---|---|---|---|---|
| Before 1981 (N = 2665) | 1981–1991 (N = 1037) | 1992–2001 (N = 693) | Since 2002 (N = 1478) | ||
| HBV infection | 2209 (82.9) | 673 (64.9) | 167 (24.1) | 35 (2.4) | <.001 |
| HBsAg carriage | 332 (12.5) | 141 (13.6) | 30 (4.3) | 3 (0.2) | <.001 |
| Anti-HBc positive | 1829 (68.6) | 561 (54.1) | 124 (17.9) | 19 (1.3) | <.001 |
| Gender | <.001 | ||||
| Male | 998 (37.4) | 300 (28.9) | 236 (34.1) | 747 (50.5) | |
| Female | 1667 (62.6) | 737 (71.1) | 457 (65.9) | 731 (49.5) | |
| Mean ages (SD) | 53.8 (7.9) | 33.7 (3.4) | 24.9 (2.8) | 10.1 (5.5) | <.001 |
| Han ethnicity | 2639 (99.0) | 1023 (98.6) | 679 (98.0) | 1457 (98.6) | .16 |
| Education level | <.001 | ||||
| Primary and below | 1164 (43.7) | 73 (7.0) | 20 (2.9) | 3 (0.2) | |
| Secondary or high school | 1214 (45.6) | 623 (60.1) | 283 (40.8) | 455 (30.8) | |
| College and above | 287 (10.8) | 341 (32.9) | 390 (56.3) | 12 (0.8) | |
| Students | 0 (0) | 0 (0) | 0 (0) | 1008 (68.2) | |
| Resident | <.001 | ||||
| Urban | 750 (28.1) | 305 (29.4) | 243 (35.1) | 489 (33.1) | |
| Rural | 1915 (71.9) | 732 (70.6) | 450 (64.9) | 989 (66.9) | |
| History of hepatitis B vaccination | <.001 | ||||
| Yes | 333 (12.5) | 372 (35.9) | 366 (52.8) | 1304 (88.2) | |
| No | 1524 (57.2) | 311 (30.0) | 113 (16.3) | 55 (3.7) | |
| Unknown | 808 (30.3) | 354 (34.1) | 214 (30.9) | 119 (8.1) | |
* Present as n (%).