Development and validation of an environmental heat strain risk assessment (EHSRA) index using structural equation modeling based on empirical relations

Table 4 Direct and indirect effects of fundamental factors on the variations of tympanic temperature

Variables	Direct effect	Indirect effect	P value
Dry temperature	0.939	0.752	P < 0.001
Wet temperature	0.857	0.686	P < 0.001
Globe temperature	0.966	0.774	P < 0.001
Air velocity	0.305	0.244	P < 0.001
Total metabolism	0.613	0.491	P < 0.001
Clothing thermal insulation	0.483	0.387	P < 0.001
Thermal strain	0.801	–	P < 0.001

ISSN: 1347-4715