Table 3.

Numerical rating pain scores at movement (NRS-M) at different time intervals in 24 h post-operatively

Post-operative time	Group A	Group B	Standardized test statistic	Pa value
Baseline	4 (0–3)	3 (0–3)	–1.143b	0.253
3 hr	2 (0–4)	5 (0–3)	4.410c	< 0.001
6 hr	3 (0–2)	4 (0–2)	3.450c	0.001
12 hr	2 (0–1)	3 (0–3)	1.981c	0.048
24 hr	2 (0–1)	3 (0–4)	3.082c	0.002

Values are expressed as median (interquartile range).

Group A: ilioinguinal iliohypogastric nerve block with ropivacaine, Group B: ilioinguinal iliohypogastric nerve block with normal saline.

^aMann–Whitney U-test. ^bRetain the null hypothesis. ^cReject the null hypothesis. P < 0.05 is considered statistically significant.