Table 3. BDNF rs6265 genotype effect on McGill Pain Questionnaire scores of PDMs during the menstrual phase.

		Met/Met	Val carrier	P
Subject number		29	49
Pain rating index		32.3 (13.47)	26.7 (12.02)	0.131
Sensory		18.5 (6.21)	14.7 (6.13)	0.017
Affective		4.2 (3.57)	3.4 (2.29)	0.554
Evaluative		2.4 (2.02)	2.1 (2.01)	0.613
Miscellaneous		7.2 (3.72)	6.5 (3.81)	0.418
Present pain intensity		2.7 (1.02)	2.6 (1.01)	0.925

Abbreviations: BDNF, brain-derived neurotrophic factor; PDM, primary dysmenorrhea; Val, valine; Met, methionine. The data are presented as the means (SD).