Continuous Femoral Nerve Block versus Intravenous Patient Controlled Analgesia for Knee Mobility and Long-Term Pain in Patients Receiving Total Knee Replacement: A Randomized Controlled Trial

Table 3

Incidence of chronic postoperative pain after TKA^#.

Intention-to-treat analysis
Time points	Group CFNB ()	Group PCIA ()	value
3 months— (%)	52 (37.1)	71 (50.7)	0.022*
6 months— (%)	36 (25.7)	54 (38.5)	0.021*
12 months— (%)	5 (3.5)	9 (6.4)	0.273
Per-protocol analysis
Time points	Group CFNB ()	Group PCIA ()	-value
3 months— (%)	52 (47.7)	71 (68.9)	0.002*
6 months— (%)	36 (33.0)	54 (52.4)	0.004*
12 months— (%)	5 (4.5)	9 (8.7)	0.224

Chi-square test was used for comparisons. .