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. Author manuscript; available in PMC: 2017 Apr 1.
Published in final edited form as: Pain. 2016 Apr;157(4):858–867. doi: 10.1097/j.pain.0000000000000449

Table 4.

Number of post-MVC cohort subjects included in this study according to sex, stress level, and number of HPS haplotype.

Female (n=1561) Male
Low Stress (n=974) High Stress (n=587) Low Stress (n=770) High Stress (n=476)
HPS haplotype 0 1 2 0 1 2 0 1 2 0 1 2
Subjects 661 274 39 395 172 20 537 205 28 333 125 18

“Low Stress” = PDI score ≤ 18; “High Stress” = PDI score > 18.