Table 1. Comparisons of the length differences between the adjacent two-fingers.

Parameters	Right index and middle fingers (n = 30) (95% CI)	Left index and middle fingers (n = 30) (95% CI)	95% CI of the difference		P value*
			Lower limit	Upper limit
Length difference (mm)	7.8 ± 2.1 (7.0 to 8.5)	7.6 ± 2.2 (6.8 to 8.4)	-0.716	1.050	0.702
	Right middle and ring fingers	Left middle and ring fingers
Length difference (mm)	5.9 ± 1.9 (5.2 to 6.6)	5.9 ± 2.7 (4.9 to 6.9)	-0.964	1.031	0.946
	Right index and middle fingers	Right middle and ring fingers
Length difference (mm)	7.8 ± 2.1 (7.0 to 8.5)	5.9 ± 1.9 (5.2 to 6.6)	1.102	2.631	< 0.001†
	Left index and middle fingers	Left middle and ring fingers
Length difference (mm)	7.6 ± 2.2 (6.8 to 8.4)	5.9 ± 2.7 (4.9 to 6.9)	0.773	2.694	0.001†

Data are presented as mean ± SD (95% CI).

^*Statistical significances were tested by two-sided paired t-tests. ^†Significant by P value < 0.05.