Table 2. Boston score, distal motor latency, DTI parameters of the patients and control group.

DTI parameters	CTS group (mean ± SD)	Control group (mean ± SD)	P value	Mean difference	95% CI (lower, upper)
Symptom Boston score	2.60±0.85	1.00±0.00	<0.001	1.60	1.32, 1.88
Functional Boston score	2.13±0.84	1.00±0.00	<0.001	1.13	0.86, 1.40
dFA	0.46±0.06	0.54±0.07	<0.001	0.09	0.05, 0.13
iFA	0.42±0.05	0.54±0.07	0.001	0.115	0.06, 0.17
mFA	0.41±0.04	0.49±0.04	<0.001	0.07	0.04, 0.10
oFA	0.41±0.05	0.49±0.03	<0.001	0.09	0.05, 0.12
dMD (mm2/s)	1.34±0.26	1.11±0.24	0.007	0.24	0.07, 0.43
iMD (mm2/s)	1.46±0.17	1.16±0.37	0.032	0.30	0.03, 0.57
mMD (mm2/s)	1.47±0.15	1.38±0.12	0.086	0.105	0.01, 0.20
oMD (mm2/s)	1.49±0.18	1.31±0.19	0.009	0.18	0.03, 0.32
dAD (mm2/s)	1.81±0.57	2.00±0.68	0.273	-0.19	-0.61, 0.23
iAD (mm2/s)	2.19±0.33	2.19±0.24	0.922	0.015	−0.21, 0.24
mAD (mm2/s)	2.38±0.34	2.26±0.26	0.297	0.12	−0.11, 0.35
oAD (mm2/s)	2.47±0.28	2.19±0.38	0.011	0.585	0.67, 0.50
dRD (mm2/s)	0.93±0.47	0.69±0.51	0.182	0.23	−0.11, 0.57
iRD (mm2/s)	1.15±0.26	0.98±0.24	0.075	0.166	−0.017, 0.35
mRD (mm2/s)	1.21±0.24	0.92±0.08	<0.001	0.285	0.19, 0.38
oRD (mm2/s)	1.14±0.25	0.83±0.16	<0.001	0.32	0.15, 0.49

CTS, carpal tunnel syndrome; DTI, diffusion tensor imaging; CI, confidence interval; d, i, m, and o, at the distal radioulnar joint, the inlet, the middle, the outlet of the carpal tunnel, respectively; FA, fractional anisotropy; MD, mean diffusivity; RD, radial diffusivity.