. 2015 Oct 14;15:146. doi: 10.1186/s12871-015-0126-5

Table 3.

Comparison of mean values of mean arterial blood pressure in the studied groups

	Pre-ope	5 min	15 min	30 min	45 min	60 min	90 min	120 min	3 h	6 h	12 h	24 h
Fentanyl group (n = 45)	90.6 ± 17.8	86.7 ± 14.5	81.5^a ± 12.9	70.5^a ± 13.8	75.6^a ± 12.5	77.8^a ± 13.6	78.5^a ± 12.8	81.2 ± 12.5	85.5 ± 13.9	88.2 ± 14.5	89.7 ± 16.8	91.3 ± 17.5
Meperidine group (n = 45)	89.7 ± 14.9	85.9 ± 16.3	79.2^a ± 12.3	80.5^ab ± 18.5	82.9^b ± 13.1	83.3^b12.4	84.5^b ± 14.5	85.8± 12.1	86.4 ± 15.3	87.3 ± 14.7	88.5 ± 15.3	90.2 ± 12.5
Clonidine group (n = 45)	92.5 ± 19.5	86.5 ± 17.2	80.4^a ± 16.9	72.2^a ± 15.4	76.4^a ± 17.5	78.5^a ± 16.8	82.8 ± 14.7	84.5 ± 13.5	86.7 ± 16.3	88.4 ± 15.7	90.2 ± 14.1	91.5 ± 17.5

^aSignificant within group change (p < 0.05)

^bSignificant among group change (p < 0.05)

Data are mean ± standard deviation