Postural correction training improves chronic pain, nerve function, and inflammation in knee osteoarthritis: A retrospective cohort study

Table 3 Comparison of the National Institute of Health Stroke Scale scores between the two groups (mean ± SD, points)

Groups	Pre-intervention	Post-intervention	Difference (the result of subtraction)
Observation group (n = 50)	18.20 ± 2.52	5.56 ± 1.20	11.98 ± 3.15
Control group (n = 50)	18.72 ± 2.95	9.90 ± 1.43	8.82 ± 3.26
t value	0.947	16.436	4.931
P value	0.346	0.000	0.000