Table 1.

The clinical features of the study subjects in two groups

Index	Traditional group n = 43	Modified group n = 37	Statistics	P
Age (year)	53.37 ± 11.07	53.78 ± 9.14	0.179	0.859
Gender (n)			2.208	0.137
Male	21	12
Female	22	25
Course of disease (year)	4.98 ± 4.30	4.17 ± 3.10	0.952	0.344
Affected side (n)			0.758	0.384
Left	34	32
Right	9	5