Table 1:

Participant characteristics (N = 62)

Variable	Mean (SD) or %	Range
Sex
Men	43.5%
Women	56.5%
Ethnicity/Race
Non-Hispanic Black	51.6%
Non-Hispanic White	48.4%
Current Tobacco Use
Yes	16.1%
No	83.9%
Average Number Weekly Alcoholic Beverages Consumed	1.6 (2.8)	0 - 15
Age - years	41.9 (15.6)	19 - 77
PCS	8.7 (9.3)	0 - 57
Sleep Onset Latency	29.3 (52.8)	2 – 292.8
Wake After Sleep Onset	51.6 (25.7)	14.3 – 118.6
Total Sleep Time	388.3 (71.8)	209 - 614
Sleep Efficiency (%)	80.4 (10.2)	38.5 – 96.5
Average Daily Dietary Caffeine Consumption (mg) – 7 days	170.8 (178.1)	0 – 643.6
Average Caffeine Consumption Day of Pain Testing (mg)	115.1 (171.2)	0 – 608.8
HPTh	44.9 (3.1)	36 – 49.4
HPTo	48.5 (1.8)	42.3 – 51.5
PPT - Forearm	415.3 (177.6)	148.9 – 1000.1
PPT - Trapezius	464.6 (213.2)	147.6 – 1000.1

Note: SD = standard deviation; BMI = body mass index; PCS = Pain Catastrophizing Scale; PSQI = Pittsburgh Sleep Quality Index; mg = milligrams