. Author manuscript; available in PMC: 2020 Sep 1.

Published in final edited form as: J Pain. 2019 Feb 27;20(9):1027–1039. doi: 10.1016/j.jpain.2019.02.012

Table 4.

Results of multilevel models for conditioned modulation of the nociceptive flexion reflex (NFR).

Predictors of NFR during CPM	df_num	df_denom	F	p
Intercept	1	143.692	269.887	<.001
Race	1	101.768	0.177	0.675
Sex	1	100.886	0.32	0.573
Global Psych Distress	1	100.908	1.435	0.234
Perceived Stress	1	100.971	1.093	0.298
Cold Water Pain	1	101.481	12.432	0.001
Stimulus Number	1	1319.956	63.717	<.001
Group	2	101.014	0.452	0.638
CPM Phase	2	473.075	10.015	<.001
Group × Phase	4	489.621	4.651	0.001

Note. CPM = conditioned pain modulation.