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General data of rats in the model observation and blank control groups.
| Item | Model observation group | Blank control group | t/χ2 | P-value |
|---|---|---|---|---|
| Male (%) | 23 (0.43) | 18 (0.45) | χ2=5.16 | 0.349 |
| Female (%) | 30 (0.57) | 22 (0.55) | χ2=5.20 | 0.351 |
| Age (days) | 39.57±2.61 | 40.07±2.25 | t=2.15 | 0.186 |
| Weight (g) | 176.16±20.32 | 180.26±16.37 | t=4.06 | 0.273 |
| Indoor temperature (°C) | 23.12±0.63 | 23.08±0.56 | χ2=1.97 | 0.156 |
| Indoor humidity (%) | 52.45±5.03 | 51.45±6.13 | χ2=2.06 | 0.175 |
