Skip to main content
. Author manuscript; available in PMC: 2016 May 1.
Published in final edited form as: J Pain. 2015 Feb 25;16(5):478–490. doi: 10.1016/j.jpain.2015.02.004

Table 2.

Tobit Hierarchical Regression Analysis of Association of Sleep measures and Temporal Summation of Heat Pain at Affected Kneea

44°C
 46°C
 48°C
Variable Estimate t Pseudo-R2 Estimate t Pseudo-R2 Estimate t Pseudo-R2
Model 1 0.09 0.10 0.09
Age 0.29 0.79 0.46 1.46 0.73* 2.35
Sex −3.76 −1.04 −4.72 −1.08 −7.21‡ −1.67
Ethnicity/Race 2.65 0.39 9.50 1.90‡ 6.97 1.40
Education −2.43 −1.19 −1.06 −0.55 −0.46 −0.24
CES-D 0.84* 3.10 0.74 2.74* 0.42 1.49
WOMAC −0.10 −0.79 −0.09 −0.72 −0.13 −1.05
Model 2 0.09 0.09 0.09
SHPS-A 0.07 0.17 0.37 0.88 0.02 0.04
Model 3 0.09 0.10 0.10
ISI −0.27 −0.57 −0.36 −0.77 −0.54 −1.17
Model 4a 0.09 0.16 0.12
Ethnicity/Race × SHPS-A 0.34 0.40 −1.51‡ −1.73 −1.07 −1.24
Ethnicity/Race × ISI −0.59 −0.65 −0.28 −0.30 −0.15 −0.17
Model 4b 0.09 0.09 0.23
Sex × SHPS-A −0.19 −0.22 0.77 0.87 3.06* 3.75
Sex × ISI −0.57 −0.66 −2.10* −2.33 −3.41* −4.26
*

p < 0.05

‡

p < 0.1

a

Variables in Models 2-4 are centered.

CES-D = Center for Epidemiologic Studies – Depression Scale; Eth = Ethnicity/Race; SHPS-A = Sleep Hygiene & Practices Scale, arousal-associated behaviors subscale; WOMAC = Western Ontario and McMasters Universities Arthritis Index