Comparison of characteristics between influenza vaccination group and non-vaccination group
| Variable | Middle school | P-value | High school | P-value | ||
|---|---|---|---|---|---|---|
| Non-vaccinated | Vaccinated | Non-vaccinated | Vaccinated | |||
| Age | 13.67±0.961 | 13.36±0.954 | <0.001 | 16.50±0.929 | 16.36±0.940 | <0.001 |
| Gender | <0.001 | 0.075 | ||||
| Man | 7,891 (50.6) | 7,760 (49.4) | 11,653 (73.4) | 4,319 (26.6) | ||
| Woman | 7,362 (48.0) | 7,870 (52.0) | 11,129 (72.1) | 4,290 (27.9) | ||
| Grade | <0.001 | <0.001 | ||||
| 1 | 4,068 (40.1) | 6,120 (59.9) | 6,882 (68.2) | 3,283 (31.8) | ||
| 2 | 4,816 (46.1) | 5,560 (53.9) | 7,975 (73.8) | 2,825 (26.2) | ||
| 3 | 6,369 (61.7) | 3,950 (38.3) | 7,925 (75.8) | 2,501 (24.2) | ||
| City type | <0.001 | 0.829 | ||||
| Small city | 1,099 (51.1) | 1,101 (49.0) | 1,948 (73.5) | 691 (26.5) | ||
| Middle sized city | 7,794 (49.3) | 7,512 (50.7) | 10,552 (72.8) | 3,950 (27.2) | ||
| Metropolitan | 6,360 (47.3) | 7,017 (52.7) | 10,282 (72.6) | 3,968 (27.4) | ||
| Economic status | <0.001 | <0.001 | ||||
| Very high | 1,807 (44.1) | 2,337 (55.9) | 1,687 (66.8) | 882 (33.2) | ||
| High | 4,552 (45.8) | 5,366 (54.2) | 5,614 (68.8) | 2,555 (31.2) | ||
| Moderate | 7,066 (51.8) | 6,563 (48.2) | 11,006 (73.8) | 3,947 (26.2) | ||
| Low | 1,535 (58.0) | 1,152 (42.0) | 3,612 (78.3) | 1,000 (21.7) | ||
| Very low | 293 (58.5) | 212 (41.5) | 863 (80.5) | 225 (19.5) | ||
| Residential type | 0.692 | 0.029 | ||||
| With family | 14,970 (49.3) | 15,308 (50.7) | 21,029 (73.0) | 7,853 (27.0) | ||
| With relatives | 111 (52.0) | 98 (48.0) | 210 (73.1) | 77 (26.9) | ||
| In dormitory | 104 (46.6) | 133 (53.4) | 1,440 (69.8) | 624 (30.2) | ||
| In nursery | 68 (46.1) | 91 (53.9) | 103 (67.3) | 55 (32.7) | ||
| School achievement | <0.001 | <0.001 | ||||
| Very high | 2,337 (45.6) | 2,764 (54.4) | 2,414 (71.3) | 1,013 (28.7) | ||
| High | 4,012 (46.4) | 4,527 (53.6) | 5,339 (71.6) | 2,117 (28.4) | ||
| Moderate | 4,003 (48.7) | 4,253 (51.3) | 6,912 (72.4) | 2,641 (27.6) | ||
| Low | 3,351 (53.3) | 2,998 (46.7) | 5,506 (73.9) | 1,963 (26.1) | ||
| Very low | 1,550 (59.2) | 1,088 (40.8) | 2,611 (75.1) | 875 (24.9) | ||
| Educational level of father | <0.001 | <0.001 | ||||
| Middle school or lower | 226 (54.6) | 188 (45.4) | 588 (77.4) | 184 (22.6) | ||
| High school | 3,153 (50.1) | 3,153 (49.9) | 7,062 (73.4) | 2,540 (26.6) | ||
| University or higher | 7,491 (47.5) | 8,270 (52.5) | 11,219 (71.5) | 4,554 (28.5) | ||
| Educational level of mother | <0.001 | <0.001 | ||||
| Middle school or lower | 213 (60.9) | 138 (39.1) | 484 (74.6) | 174 (25.4) | ||
| High school | 3,795 (50.0) | 3,826 (50.0) | 8,720 (73.9) | 3,086 (26.1) | ||
| University or higher | 7,145 (47.3) | 7,895 (52.7) | 9,864 (71.0) | 4,100 (29.0) | ||
| Experience of part-time job | <0.001 | 0.001 | ||||
| No | 14,470 (49.0) | 15,052 (51.0) | 17,550 (72.3) | 6,798 (27.7) | ||
| Yes | 783 (57.5) | 578 (42.5) | 5,232 (74.4) | 1,811 (25.6) | ||
| Weekly allowance (10,000 won) | 0.858 | 0.002 | ||||
| <1 | 5,909 (49.4) | 6,011 (50.6) | 4,432 (74.7) | 1,508 (25.3) | ||
| 1–2 | 4,507 (49.1) | 4,644 (50.9) | 5,791 (72.6) | 2,206 (27.4) | ||
| 2–3 | 1,829 (48.9) | 1,884 (51.1) | 3,547 (72.8) | 1,344 (27.2) | ||
| ≥3 | 3,008 (49.7) | 3,091 (50.3) | 9,012 (71.9) | 3,551 (28.1) | ||
| Ever smoked | <0.001 | 0.002 | ||||
| No | 14,032 (48.8) | 14,633 (51.2) | 18,376 (72.3) | 7,083 (27.7) | ||
| Yes | 1,221 (55.9) | 997 (44.1) | 4,406 (74.5) | 1,526 (25.5) | ||
| Ever drank alcohol | <0.001 | 0.001 | ||||
| No | 10,962 (48.4) | 11,736 (51.6) | 10,852 (71.8) | 4,307 (28.2) | ||
| Yes | 4,291 (52.1) | 3,894 (47.9) | 11,930 (73.7) | 4,302 (26.3) | ||
| Physical activity | 0.004 | <0.001 | ||||
| Non-optimal intensity | 14,319 (49.6) | 14,472 (50.4) | 21,805 (73.0) | 8,153 (27.0) | ||
| Optimal intensity | 934 (45.7) | 1,158 (54.3) | 977 (68.1) | 456 (31.9) | ||
| Asthma | <0.001 | <0.001 | ||||
| No | 14,031 (49.7) | 14,178 (50.3) | 20,903 (73.1) | 7,740 (26.9) | ||
| Yes | 1,222 (45.6) | 1,452 (54.4) | 1,879 (68.8) | 869 (31.2) | ||
| Allergic rhinitis | <0.001 | <0.001 | ||||
| No | 10,635 (51.2) | 10,169 (48.8) | 14,738 (75.0) | 4,973 (25.0) | ||
| Yes | 4,618 (45.7) | 5,461 (54.3) | 8,044 (69.1) | 3,636 (30.9) | ||
| Atopic dermatitis | ||||||
| No | 11,577 (49.2) | 11,930 (50.9) | 0.575 | 16,832 (72.7) | 6,399 (27.3) | 0.699 |
| Yes | 3,676 (49.7) | 3,700 (50.3) | 5,950 (72.9) | 2,200 (27.1) | ||
Values are presented as number (%) or mean±standard deviation.