Table 2.

Bivariate relationship analysis between potential risk factors and BCTQ symptom and function scores at each measurement time.

Variables	BCTQ at 3months				BCTQ at 12 months
	Symptom scores	p	Function scores	p	Symptom scores	p	Function scores	p
Gender
Women (n = 96)	1.8 ± 0.6	0.03	1.7 ± 0.6	0.04	1.5 ± 0.6	0.14	1.4 ± 0.6	0.10
Men (n = 24)	1.5 ± 0.6		1.4 ± 0.6		1.3 ± 0.6		1.2 ± 0.5
Hand dominance
Dominant (n = 74)	1.7 ± 0.6	0.37	1.6 ± 0.6	0.40	1.6 ± 0.6	0.32	1.4 ± 0.6	0.34
Nondominant (n = 46)	1.6 ± 0.6		1.5 ± 0.6		1.4 ± 0.6		1.3 ± 0.5
Bilaterality
Bilateral (n = 36)	1.8 ± 0.6	0.13	1.7 ± 0.6	0.24	1.5 ± 0.6	0.11	1.4 ± 0.6	0.27
Unilateral (n = 84)	1.6 ± 0.6		1.5 ± 0.6		1.3 ± 0.6		1.3 ± 0.6
Electophysiologic gradea
Mild (n = 13)	1.6 ± 0.6	0.11	1.5 ± 0.5	0.14	1.3 ± 0.5	0.09	1.2 ± 0.5	0.03
Moderate (n = 64)	1.6 ± 0.6		1.6 ± 0.6		1.4 ± 0.6		1.2 ± 0.6
Severe (n = 43)	1.8 ± 0.6		1.8 ± 0.6		1.6 ± 0.6		1.5 ± 0.6
	Correlation coefficient	p	Correlation coefficient	p	Correlation coefficient	p	Correlation coefficient	p
Age	0.12	0.38	0.15	0.42	0.10	0.51	0.03	0.72
BMI	0.25	0.13	0.20	0.30	0.20	0.29	0.18	0.34
Education	0.20	0.32	0.15	0.51	0.12	0.61	0.15	0.55
Symptom duration	0.31	0.12	0.27	0.19	0.34	0.14	0.32	0.17
PPT	0.45	0.02	0.40	0.03	0.35	0.10	0.30	0.13
CSI	0.53	0.01	0.51	0.01	0.37	0.09	0.35	0.10
Baseline BCTQ symptom	0.25	0.22	0.28	0.19	0.27	0.15	0.30	0.11
Baseline BCTQ function	0.32	0.10	0.29	0.13	0.30	0.14	0.37	0.07

PPT = pain pressure thresholds; CSI = Central Sensitization Inventory; BMI = body mass index; BCTQ = Boston Carpal Tunnel Questionnaire.

^aBland staging was applied to grade the electrophysiologic severity; grades 0 and 1 were grouped as mild, grades 2 and 3 were grouped as moderate, and grades above 3 were grouped as severe.