Pain-related phenotypes (PP; analgesic requirements or pain scores) were examined.
The rs3845446 single nucleotide polymorphism (SNP) was genotyped in the subjects.
The G allele of the rs3845446 SNP enhanced PP after gastrointestinal surgery (GS).
Association of the SNP with PP after GS opposed to that after orthognathic surgery.
30">Cav2.3 channel functions might differentiate PP after GS and orthognathic surgery.