. Author manuscript; available in PMC: 2012 Sep 4.

Published in final edited form as: Sleep Med. 2011 May 12;12(6):603–609. doi: 10.1016/j.sleep.2010.09.018

Table 1.

Laboratory pain and questionnaire response data by participant group.

Variable	Controls	RLS-Treated	RLS-Untreated
Age	60.5 ± 8.8	63.3 ± 9.4	58.0 ± 9.5
% female	44%	53%	50%
% white	89%	93%	94%
HPTh (arm) (°C)	46.5 ± 3.9^a	43.7 ± 4.4^b	45.0 ± 2.9^ab
PPTh-Leg (kPa)	898.6 ± 326.9^a	687.3 ± 274.5^b	670.0 ± 257.0^b
PPTh-Thumb (kPa)	444.0 ± 150.9	374.7 ± 164.2	358.7 ± 113.8
PPTh-Trapezius (kPa)	608.4 ± 252.1^a	442.0 ± 149.6^b	468.9 ± 164.7^b
Cold Pain Ratings (0–100)	65.4 ± 21.3	77.1 ± 17.1	70.7 ± 14.8
DNIC Index	134.4 ± 44.3	121.8 ± 20.2	123.3 ± 30.2
JHRLSSS	0.0 ± 0^a	2.1 ± 0.6^b	2.0 ± 0.8^b
SF-36 BP	89.7 ± 12.0^a	65.5 ± 21.1^b	73.6 ± 19.8^b
PSQI	6.0 ± 3.0^a	12.7 ± 3.9^b	12.9 ± 4.5^b
BDI	2.6 ± 3.0^a	9.7 ± 11.1^b	6.5 ± 6.3^ab

^ab

Groups with like letters do not differ; groups with differing letters differ at p< .05.

Note: HPTh= Heat Pain Threshold; PPTh= Pressure Pain Threshold, in Kilopascales; DNIC= Diffuse Noxious Inhibitory Controls; JHRLSSS= Johns Hopkins Restless Legs Syndrome Severity Scale; SF-36 BP= Short Form 36, Bodily Pain; PSQI= Pittsburgh Sleep Quality Index; BDI= Beck Depression Inventory;