Table 2. Relationship betweenthe environmental and physiological parameters and for the heat stress indices.
| Variable | WBGT (°C) | UTCI (°C) |
HSI (%) | |
|---|---|---|---|---|
| Environmental parameters | ||||
| Dry-bulb temperature (°C) | R p-value |
0.910 0.001 |
0.983 0.001 |
0.258 0.045 |
| Natural wet bulb temperature (°C) | R p-value |
0.935 0.001 |
0.794 0.001 |
0.271 0.033 |
| Globe temperature (°C) | R p-value |
0.903 0.001 |
0.948 0.001 |
0.262 0.001 |
| Relative humidity (%) | R p-value |
0.343 0.001 |
0.288 0.022 |
0.214 0.095 |
| Air velocity (m/s) | R p-value |
−0.198 0.389 |
−0.234 0.308 |
0.019 0.885 |
| MRT (°C) | R p-value |
0.528 0.001 |
0.530 0.001 |
0.284 0.025 |
| Physiological parameters | ||||
| Oral temperature (°C) | R p-value |
0.474 0.001 |
0.514 0.001 |
0.291 0.023 |
| Aural temperature (°C) | R p-value |
0.474 0.001 |
0.506 0.001 |
0.037 0.777 |
| Mean skin temperature (°C) | R p-value |
0.457 0.001 |
0.502 0.001 |
0.279 0.027 |
| Heart rate (beat/min) | R p-value |
0.275 0.029 |
0.279 0.025 |
0.123 0.343 |
| Heat stress indices | ||||
| Wet-bulb globe temperature (WBGT) (°C) | R p-value |
1 | 0.950 0.001 |
0.214 0.100 |
| Universal Thermal Climate Index (UTCI) (°C) | R p-value |
0.950 0.001 |
1 | 0.133 0.303 |
| Heat stress index (HSI) (%) | R p-value |
0.214 0.100 |
0.133 0.303 |
1 |