No association of polymorphisms in the serotonin transporter gene with thermal pain sensation in healthy individuals

Table 3 Thermal grill responders

TG responders	Low 5-HTT expression	High 5-HTT expression	P-value
Thermal grill burning hot
TG responder	10 (7 females)	6 (3 females)	0.40^a
TG non-responder	30 (12 females)	34 (17 females)
Thermal grill painful
TG responder	10 (5 females)	5 (2 females)	0.52^a
TG non-responder	30 (14 females)	35 (18 females)

^aFisher’s exact.
Number of TG responders defined either by 1) participants ranking TG condition (and not 40°C) as burning hot and 2) participants having higher pain ratings during the TG condition than during 10 or 40°C.

ISSN: 1744-8069