Table 1.

Demographic and Morphometric Characteristics, Baseline Current Perception, Pain Perception, and Pain Tolerance Thresholds (mA).

	Red Hair	Dark Hair	P
Data presented as means ± SDs. Comparisons made with unpaired, two-tailed T-tests.
Height (cm)	163 ± 8	161 ± 6	0.25
Weight (kg)	65 ± 11	62 ± 10	0.35
Age (years)	27 ± 5	27 ± 6	0.86
Current Threshold Perception
2000 Hz	2.16 ± 0.44	2.02 ± 0.38	0.20
250 Hz	0.78 ± 0.18	0.74 ± 0.20	0.40
5 Hz	0.44 ± 0.18	0.46 ± 0.22	0.75
Pain Perception Threshold
2000 Hz	6.8 ± 2.8	7.2 ± 3.3	0.60
250 Hz	2.8 ± 1.3	3.2 ± 2.1	0.33
5 Hz	1.9 ± 1.1	2.2 ± 1.1	0.35
Pain Tolerance Threshold
2000 Hz	10.5 ± 3.8	10.9 ± 4.0	0.68
250 Hz	4.2 ± 1.7	4.7 ± 2.9	0.42
5 Hz	2.8 ± 1.4	3.3 ± 1.9	0.27