Comparison of continuous pericapsular nerve group (PENG) block versus continuous fascia iliaca compartment block on pain management and quadriceps muscle strength after total hip arthroplasty: a prospective, randomized controlled study

Table 3 Comparison of exercise NRS pain scores between the two groups

	PENG group, n = 29	FICB group, n = 28	F _intergroup, P	F _time, P	F _Interaction, P	PENG group vs.FICB group median difference (95% CI), P
T0	7 (6, 8)	7 (6, 8)	16.931, < 0.001	322.145, < 0.001	3.930, 0.002	0 (-1 to 0), 0.870
T1	2 (1, 3) ^ab	3 (2, 4) ^a				-1 (-1 to 0), 0.003
T2	2 (2, 3) ^ab	3 (3, 4) ^a				-1 (-2 to -1), < 0.001
T3	3 (3, 4) ^ab	4 (3, 5) ^a				-1 (-1 to 0), 0.001
T4	3 (2, 3) ^ab	4 (3, 4) ^a				-1 (-1 to -1), < 0.001
T5	2 (2, 3) ^ab	3 (3, 4) ^a				-1 (-1 to 0), < 0.001

Data are presented as median (IQR). Multiple time points were compared using repeated-measures ANOVA. Comparison between the groups was analyzed using the Mann-Whitney U test. F_intergroup: F-value of the test statistic for inter-group comparison between groups; F_time: F-value of the test statistic for multiple time points comparison between groups; F_Interaction: F-value of the test statistic for interaction comparison between groups. ^a Denotes statistical significance compared to the T0 within the group. ^b Denotes statistical significance between the groups. PENG group: continuous pericapsular nerve group block; FICB group: continuous fascia iliac compartment block. NRS: numerical rating scale.CI: interquartile range

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