TABLE 4.

Comparison of haemodynamic changes with prone positions

Factor		PVI group (n = 33)	Conventional group (n = 33)	Mean difference (95% CI)	P-value
PVI
	Supine	11.18 ± 2.04	13.18 ± 4.12	–2 (–3.6:–0.4)	0.015*
	Prone	12.97 ± 4.39	13.39 ± 5.64	–0.42 (–2.91:2.06)	0.734
	Change	1.79 ± 5.46	0.21 ± 5.63	1.58 (–1.02:4.2)	0.225
PI
	Supine	3.57 ± 1.76	3.85 ± 3.45	–0.28 (–1.63:1.07)	0.681
	Prone	3.27 ± 1.68	3.52 ± 2.2	–0.24 (–1.21:0.72)	0.616
	Change	–0.3 ± 1.7	-0.33 ± 2.83	0.03 (–1.03:1.10)	0.948
Heart rate
	Supine	94.61 ± 14.18	94.15 ± 13.5	0.45 (–6.36:7.26)	0.894
	Prone	93.03 ± 18.65	94.15 ± 17.91	–1.12 (–10.11:7.87)	0.804
	Change	–1.58 ± 10.4	0 ± 11.89	–1.58 (–7.54:4.39)	0.594
Mean blood pressure
	Supine	94.67 ± 11.75	93.06 ± 17.91	1.61 (–5.84:9.06)	0.668
	Prone	88.67 ± 14.32	84.97 ± 15.05	3.7 (–3.53:10.92)	0.310
	Change	–6 ± 15.58**	–8.09 ± 16.43**	2.09 (–5.09:9.28)	0.557
Systolic blood pressure
	Supine	130.58 ± 14.21	124.7 ± 25.97	5.88 (–4.42:16.17)	0.258
	Prone	122.85 ± 19.94	112.97 ± 23.46	9.88 (–0.83:20.58)	0.070
	Change	–7.73 ± 22.55	–11.73 ± 22.76**	4.00 (–5.84:13.84)	0.414
Diastolic blood pressure
	Supine	76.15 ± 11.8	74.85 ± 14.9	1.3 (–5.31: 7.91)	0.695
	Prone	68.42 ± 12.14	68.18 ± 14.77	0.24 (–6.41: 6.89)	0.942
	Change	–7.73 ± 16.53**	–6.67 ± 16.17**	–1.06 (–7.57:5.45)	0.742

Data are presented as mean± standard deviation.

^*Represents significant p-value between groups.

^**Represents significant p-value within the same group after changing position from supine to prone.

PVI – plethysmographic variability index, PI – perfusion index.

P-value ≤ 0.05 is statistically significant.