Table 4.

Comparison of cervical vertebra curvature between the two groups

Groups	Cases	Before treatment	After treatment
Observation group	57	5.91±1.28	10.88±2.37*
Control group	57	5.86±1.10	8.27±1.83*
t value		0.223	6.581
P value		0.823	<0.001

Note: Compared with those before treatment in the same group;

^*P<0.001.