Table 4.
Relationship between sports club and/or cram school attendance and the rate of wearing glasses.
| Sports Club/ Cram School |
0 Times | 1 Times | 2 Times | 3 Times | 4 Times | 5 Times | 6 Times | 7 Times | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| N | % | N | % | N | % | N | % | N | % | N | % | N | % | N | % | |
| 0 times | 466 | 17.6 | 85 | 11.8 | 207 | 16.4 | 199 | 39.2 *** | 141 | 53.2 *** | 81 | 49.4 *** | 40 | 50.0 *** | 32 | 53.1 *** |
| 1 time | 269 | 11.5 * | 141 | 15.6 | 232 | 20.3 | 134 | 26.9 & | 52 | 44.2 | 19 | 31.6 | 4 | 50.0 | 3 | 66.7 |
| 2 times | 214 | 15.0 | 102 | 11.8 | 177 | 18.6 | 99 | 20.2 && | 32 | 18.8 ### | 11 | 9.1 $ | 3 | 66.7 | 4 | 25.0 |
| 3 times | 125 | 9.6 * | 81 | 11.1 | 93 | 16.1 | 46 | 26.1 | 9 | 0.00 ## | 5 | 0.00 | 0 | 0.00 | 0 | 0.00 |
| 4 times | 82 | 11.0 | 41 | 17.1 | 55 | 14.5 | 29 | 24.1 | 6 | 16.7 | 1 | 0.00 | 1 | 0.00 | 0 | 0.00 |
| 5 times | 35 | 11.4 | 18 | 27.8 | 32 | 6.30 | 7 | 0.00 & | 2 | 0.00 | 1 | 100 | 0 | 0.00 | 0 | 0.00 |
| 6 times | 27 | 7.40 | 11 | 36.4 | 11 | 0.00 | 1 | 0.00 | 1 | 0.00 | 2 | 50.0 | 0 | 0.00 | 0 | 0.00 |
| 7 times | 13 | 0.00 | 3 | 0.00 | 8 | 0.00 | 2 | 0.00 | 0 | 0.00 | 0 | 0.00 | 0 | 0.00 | 0 | 0.00 |
* p < 0.05 vs. SC 0/CS 0, *** p < 0.001 vs. SC 0/CS 0, & p < 0.05 vs. SC 0/CS 3, && p < 0.01 vs. SC 0/CS 3, ## p < 0.01 vs. SC 0/CS 4, ### p < 0.001 vs. SC 0/CS 4, $ p < 0.05 vs. SC 0/CS 5. Fisher’s exact test was used for all statistics.