Efficacy of Deep Cervical Flexor Muscle Training on Neck Pain, Functional Disability, and Muscle Endurance in School Teachers: A Clinical Trial

Table 4

Comparison of disability scores (NDI, points) between the groups: , values.

		Experimental group ()
		Day 0	Day 14	Day 42
Control group ()	Day 0	0.05	0.04	0.01
	Day 14	0.01	0.05	0.01
	Day 42	0.01	0.50	0.01

The data are presented as . NDI: neck disability index. Nonparametric analysis of variance (Kruskal-Wallis test). Significant .