Table 3 Detection rate of AL level in college students of different outdoor time and PA
Variables | AL level | χ2 | P value | |
|---|---|---|---|---|
Low (n=382) | High (n=347) | |||
Total outdoor time | Â | Â | 20.13 | <0.001 |
 High | 138 (65.4) | 73 (34.6) |  |  |
 Low | 244 (47.1) | 274 (52.9) |  |  |
Free day outdoor time | Â | Â | 9.26 | 0.002 |
 High | 122 (61.6) | 76 (38.4) |  |  |
 Low | 260 (49.0) | 271 (51.0) |  |  |
Work day outdoor time | Â | Â | 29.20 | <0.001 |
 High | 114 (71.3) | 46 (28.8) |  |  |
 Low | 268 (47.1) | 301 (52.9) |  |  |
PA | Â | Â | 7.18 | 0.007 |
 Moderate and above | 333 (54.6) | 277 (45.4) |  |  |
 Low | 49 (41.2) | 70 (58.8) |  |  |