Table 7 Difference Test of Symptom Frequency in Skeletal muscle system before and after Matching.
| Â | Â | Before matching | After matching | ||||||
|---|---|---|---|---|---|---|---|---|---|
Low exposure | High exposure | χ2 | P | Low exposure | High exposure | χ2 | P | ||
Pain and swelling of fingers or toes of unknown origin | Â | Â | Â | 1.376 | 0.502 | Â | Â | 2.089 | 0.352 |
| Â | Nothing | 774 | 314 | Â | Â | 316 | 314 | Â | Â |
| Â | Light | 157 | 56 | Â | Â | 62 | 56 | Â | Â |
| Â | Middle | 44 | 22 | Â | Â | 14 | 22 | Â | Â |
Pain, swelling and weakness in the joints of hands and feet | Â | Â | Â | 3.062 | 0.216 | Â | Â | 7.472 | 0.024 |
| Â | Nothing | 713 | 267 | Â | Â | 296 | 268 | Â | Â |
| Â | Light | 180 | 86 | Â | Â | 77 | 86 | Â | Â |
| Â | Middle | 83 | 38 | Â | Â | 20 | 38 | Â | Â |
Muscle soreness and pain in the whole body | Â | Â | Â | 0.121 | 0.941 | Â | Â | 1.411 | 0.494 |
| Â | Nothing | 669 | 266 | Â | Â | 281 | 266 | Â | Â |
| Â | Light | 218 | 88 | Â | Â | 79 | 88 | Â | Â |
| Â | Middle | 89 | 38 | Â | Â | 32 | 38 | Â | Â |