Table 1.

Environmental parameters (Mean ± SE).

Item	L-THI group	H-THI group	P-value
08:00–19:00
THI	70.8 ± 0.451	75.1 ± 0.980	<0.001
Temperature (°C)	28.6 ± 0.313	31.0 ± 0.554	<0.001
Relative humidity (%)	91.8 ± 1.23	79.8 ± 2.41	<0.001
20:00–09:00
THI	67.9 ± 0.182	68.4 ± 0.183	0.573
Temperature (°C)	26.3 ± 0.121	26.7 ± 0.140	0.468
Relative humidity (%)	98.6 ± 0.283	96.5 ± 0.511	0.296

The data were analyzed using T-test of SPSS 22.0 software (SPSS, INC., Chicago, IL, USA).

H-THI, high temperature-humidity index; L-THI, low temperature-humidity index.