Table 4.

Comparison of joint range of motion scores between 2 groups of patients (person) M(P25, P75).

	Control group (n = 101)	Experimental group—high concentration alkaline water (n = 100)	Experimental group—medium concentration alkaline water (n = 100)	Experimental group—low concentration alkaline water (n = 96)	H	P
Before treatment	2.47 (1.94, 3.08)	2.34 (1.88, 2.67)	2.31 (1.85, 2.65)	2.33 (1.86, 2.68)	66.31	2.63 × 10−14
3 mo after treatment	2.34 (1.89, 2.81)	2.39 (1.88, 2.73)	1.96 (1.59, 2.25)	1.43 (1.09, 1.68)	317.88	1.34 × 10−68
6 mo after treatment	2.38 (1.98, 2.82)	2.27 (1.83, 2.70)	2.08 (1.67, 2.38)	1.50 (1.16, 1.88)	292.35	4.50 × 10−63
12 mo after treatment	2.67 (2.14, 3.03)	2.29 (1.89, 2.80)	2.01 (1.64, 2.41)	1.51 (1.10, 1.82)	337.85	6.38 × 10−73

Non-normal distribution data that do not conform to a normal distribution are described using median (interquartile range) (M (P25, P75)) and independent sample Kruskal-Wallis H test. Compare between groups for parameters with statistically significant differences.