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. Author manuscript; available in PMC: 2016 Jul 1.
Published in final edited form as: J Pain. 2015 Apr 2;16(7):637–644. doi: 10.1016/j.jpain.2015.03.011

Table 2.

Linear regression model results demonstrating a main effect of OPMR1 allele A118G on overall pain severity six weeks after motor vehicle collision (MVC) and an A118G-sex interaction (n = 859)

Independent variablea Beta SE P
A118G (presence or absence of G allele) 0.815 0.358 0.023
Female Sex 0.857 0.222 <0.001
A118G allele * Sex −1.059 0.446 0.017
Age 0.023 0.007 0.001
Education −0.249 0.072 0.001
Income −0.164 0.054 0.003
Pain at the time of initial evaluation 0.046 0.004 <0.001
Pain prior to MVC 0.025 0.041 0.549
a

Study site was also included in model as a categorical variable