Table 2.

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

Post-operative time	Group A	Group B	Standardized test statistic	Pa value
Baseline	0 (0–2)	0 (0–0)	–2.156c	0.031
3 hr	0 (0–2)	2 (0–3)	3.551c	< 0.001
6 hr	2 (0–3)	2 (0–2)	2.492c	0.013
12 hr	1 (0–2)	2 (0–2)	1.140b	0.254
24 hr	0 (0–2)	2 (0–3)	1.739b	0.082

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.