Table 4.

Individual data for predicted versus measured sweat sodium concentration for tattooed sites

Tattooed Sites (n = 11)	Predicted whole‐body sweat [Na+] (mmol/L)	Measured whole‐body sweat [Na+] (mmol/L)	Difference (mmol/L)
Upper arm	29.9	22.9	7.0
Upper arm	36.1	30.5	5.6
Upper arm	33.4	25.4	8.0
Upper arm	40.3	59.7	−19.4
Chest	30.7	22.9	7.8
Upper back	24.2	22.9	1.3
Upper back	28.2	30.5	−2.3
Upper back	29.6	25.4	4.2
Upper back	47.5	43.8	3.7
Calf	32.2	22.9	9.3
Calf	53.5	61.9	−8.4

[Na⁺], sodium concentration.