Table 2.

Preoperative and postoperative VAS scores [M(Q1~Q3)]

Groups	Cases	T1	T2	T3	T4
PKP group	20	7 (7~8)	2 (2~3)a	2 (2~3)a	1 (1~2)a
BFMC group	20	7.5 (7~8)	2 (2~3)a	1 (1~2)a	1.5 (1~2)a
Z value		− 0.73	− 0.44	− 1.58	− 0.62
p value		0.94	0.66	0.11	0.53

Note: Compared with T1, p < 0.05a was considered to indicate a significant difference

T1, before operation; T2, after operation; T3, 1 month; T4, 6 months