Table 3.

Means, Standard Deviations and Correlations among study variables

	M	SD	1	2	3	4	5	6
1 Sleep Quality	1.92	0.66	-
2 Pain Intensity	3.09	1.63	−.35**
3 Pain Interference	2.69	1.86	−.35**	.85**
4 Downtime	2.43	1.48	−.21*	.62**	.72**
5 Negative Affect	7.01	7.12	−.34**	.62**	.57**	.49**
6 Positive Affect	7.75	.48	.49**	−.16	−.18	−.17	−.34*
7 Pain Catastrophizing	5.63	4.84	−.27**	.78**	.76**	.60**	.73**	−.28**

Note.

^*p<.05,

^**p <.01.

Sleep was rated on a five-point scale item 0 (not at all restful) to 4 (extremely restful). Pain Intensity, Interference and Downtime were rated on 9-point scales with anchors at 0 (not at all) to 8 (extremely). The Negative Affect Scale included six items and the Positive Affect scales included three items each using the same 9-point rating scale. The Pain Catastrophizing Scale was three items and used the same 9-point rating scale.