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. Author manuscript; available in PMC: 2017 Jan 1.
Published in final edited form as: Scand J Pain. 2016 Jan 1;10:6–12. doi: 10.1016/j.sjpain.2015.07.004

Table 3.

Differences in Within-Person Daily Knee Pain Variability by COMT rs4680, and OPRM1 rs1799971

Daily Knee Pain COMT P-value OPRM1 P-value
Estimate (SE) Estimate (SE)
Beginning of Day −0.11 (0.07) .160 0.21 (0.08) .009
Afternoon −0.24 (0.07) .001 0.13 (0.08) .084
End of Day −0.28 (0.07) .0002 0.18 (0.08) .028
Across the Day −0.15 (0.07) .030 0.15 (0.07) .037

Notes. Across the Day = average of beginning of day, afternoon, and end of day. All analyses control for age, race, sex, and day in study (i.e., 1 to 22). Coding of COMT rs4680: G-G = 0; A-A, A-G = 1. Coding of OPRM1 rs1799971: A-G = 0, A-A = 1.