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 4

Incidence of chronic postoperative moderate-to-severe pain in motion^#.

Intention-to-treat analysis
Time points	Group CFNB ()	Group PCIA ()	value
3 months— (%)	38 (27.1)	47 (33.5)	0.242
6 months— (%)	25 (17.8)	37 (26.4)	0.084
12 months— (%)	2 (1.4)	5 (4.3)	0.251
Per-protocol analysis
Time points	Group CFNB ()	Group PCIA ()	value
3 months— (%)	38 (34.8)	47 (46.0)	0.047*
6 months— (%)	25 (22.9)	37 (36.3)	0.034*
12 months— (%)	2 (1.8)	5 (4.9)	0.214

Chi-square test was used for comparisons..