Table 3. Significant traits identified in four analyses: 1. Total group using ANOVA, 2–4 paired cohorts using independent sample t-tests.

Group	1.Total group n = 72		2.Control v SM n = 47		3.Control v CM pain n = 41		4. pain v SM n = 56
variables	F	p-value	t	p-value	t	p-value	t	p-value
L2^ (fac)	5.93	0.004	2.25	0.030	3.41	0.002
L3* (dib)	4.39	0.016	-2.90	0.007
L7 (bdi)	4.57	0.014	2.95	0.013
L10* (afg)	4.86	0.011	2.79	0.008			-2.55	0.014
line bk	4.10	0.021			-3.28	0.003
line ai	5.20	0.008	3.22	0.002
Ellipticity	7.27	0.010	3.72	0.001	2.73	0.010
bottom angle	3.47	0.037					2.82	0.007
OB angle	3.69	0.030			-3.15	0.003

*trait significant in previous GB studies

L = angle

OB = olfactory bulb

F: F-test from one factor ANOVA significance

t: t-test statistic from independent sample t-test.