Effects of dexmedetomidine on stress hormones in patients undergoing cardiac valve replacement: a randomized controlled trial

Table 3 Comparison of postoperative follow-up between the two groups (\( \overline{X} \) ±SD, n = 30)

Postoperative follow-up	Group C	Group D	t(x²)	P value
Hospitalization time in ICU (h)	90.4 ± 72.0	55.4 ± 41.9	2.30	0.026
Ventilator support time (h)	44.5 ± 40.20	19.3 ± 16.3	2.11	0.042
Patients with improvement^△ [YES/NO, n (%)]	25 (83)/5 (17)	30 (100)/0 (0)	5.46	0.020
Hospitalization expenses (Ten thousand yuan)	12.5 ± 5.1	11.4 ± 4.4	0.57	0.572

^△ Patients with improvement were defined as improvement of cardiac function, no abnormity of valve replacement, normal coagulation function and general condition

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