Analgesic Effects, Birth Process, and Prognosis of Pregnant Women in Normal Labor by Epidural Analgesia Using Sufentanil in Combination with Ropivacaine: A Retrospective Cohort Study

Table 2

Comparison of VAS scores between the two groups [ ± s, points].

Grouping	N	Before analgesia	After analgesia 10 min	After analgesia 20 min	After analgesia 30 min
Control group	30	8.59 ± 1.21	6.69 ± 0.31	5.69 ± 1.22	3.55 ± 0.52
Research group	30	8.58 ± 1.22	5.31 ± 1.33	4.31 ± 1.21	2.21 ± 0.31
t value		0.031	5.534	4.398	12.123
value		>0.05	<0.05	<0.05	<0.05