Table 3.

Comparison of measured whole‐body sweat sodium concentration versus predicted whole‐body and raw regional sweat sodium concentration

	Predicted whole‐body sweat [Na+] vs. Measured whole‐body sweat [Na+]			Raw regional sweat [Na+] vs. Measured whole‐body sweat [Na+]
	Difference ± SD (mmol/L)	Effect Size	95% LOA (mmol/L)	Difference ± SD (mmol/L)	Effect Size	95% LOA (mmol/L)
Dorsal forearm	3.4 ± 7.1*	0.27	−10.4 to 17.2 (±13.8)	10.2 ± 10.2*	0.47	−9.8 to 30.2 (±20.0)
Ventral forearm	3.9 ± 6.2*	0.26	−8.3 to 16.1 (±12.2)	0.2 ± 9.7	0.01	−18.9 to 19.2 (±19.0)
Upper arm	0.3 ± 7.0	0.03	−13.3 to 14.0 (±13.7)	9.4 ± 10.0*	0.43	−10.1 to 29.0 (±19.6)
Chest	2.4 ± 8.5	0.20	−14.2 to 19.1 (±16.6)	21.5 ± 12.8*	0.94	−3.7 to 46.6 (±25.2)
Upper back	−1.7 ± 8.0	0.15	−17.4 to 14.1 (±15.7)	23.0 ± 12.2*	1.00	−1.0 to 46.9 (±23.9)
Thigh	4.6 ± 6.5*	0.30	−8.1 to 17.3 (±12.7)	−0.3 ± 7.5	0.02	−15.0 to 14.5 (±14.8)
Calf	3.6 ± 7.5*	0.24	−11.0 to 18.3 (±14.7)	−3.5 ± 9.4	0.18	−21.8 to 14.9 (±18.4)

n = 49 for all except upper arm (n = 48). [Na⁺], sodium concentration. Effect size definitions per Cohen (Cohen, 1988): small: <0.2, moderate: 0.2– 0.8, large: >0.8.

^* p < .05 Predicted whole‐body versus measured whole‐body or raw regional versus measured whole‐body (one‐way ANOVA with Dunnett's post hoc); difference calculated as predicted minus measured.