Table 1 The statistical distribution of studied variables
From: Development of a personal heat strain risk assessment (PHSRA) index in workplaces and its validation
Variable | Range | Mean | Standard deviation | |
|---|---|---|---|---|
Personal factors | Age (year) | 22.00–55.00 | 36.62 | 8.24 |
Body mass index (kg/m2) | 19.23–34.94 | 26.06 | 4.07 | |
Maximum aerobic capacity (ml/(kg·min)) | 29.30–44.16 | 36.16 | 3.20 | |
Body surface area (m2) | 1.64–2.47 | 1.96 | 0.17 | |
Main factors | Dry temperature (°C) | 21.97–48.20 | 24.78 | 6.01 |
Wet temperature (°C) | 12.10–37.57 | 22.01 | 6.60 | |
Globe temperature (°C) | 23.40–62.43 | 39.89 | 9.73 | |
Wind speed (m/s) | 0.00–4.20 | 0.58 | 0.39 | |
Total metabolism (watts) | 130.00–490.00 | 248.47 | 103.70 | |
Clothing thermal resistance (clo) | 0.50–1.35 | 0.83 | 0.14 | |
Physiological parameters | Resting tympanic temperature (°C) | 36.70–37.40 | 37.01 | 0.15 |
Working tympanic temperature (°C) | 36.70–39.10 | 37.70 | 0.56 | |
Resting heart rate (beat/min) | 64.00–94.00 | 76.14 | 5.99 | |
Working heart rate (beat/min) | 70.00–189.00 | 1.21 | 28.45 | |