Comparison of an automatic analysis and a manual analysis of conjunctival microcirculation in a sheep model of haemorrhagic shock

Intensive Care Medicine Experimental

Table 4 Bland-Altman analysis between manual and automatic analyses

Variable	Data set	Number	Mean bias [95% CI]	LOA
TVD [mm*mm⁻²]	All videos	85	7.44 [6.12–8.77]	−4.57–19.45
	Baseline	41	7.66 [5.66–9.67]	−4.79–20.11
	Shock	44	7.24 [5.42–9.06]	−4.50–18.98
PVD [mm*mm⁻²]	All videos	85	3.37 [1.61–5.12]	−12.58–19.32
	Baseline	41	5.61 [3.45–7.78]	−7.84–19.06
	Shock	44	1.27 [−1.38–3.93]	−15.84–18.38
PPV [%]	All videos	85	−23.09 [−29.66–(−16.51)]	−82.83–36.65
	Baseline	41	−11.62 [−17.34–(−5.91)]	−47.12–23.88
	Shock	44	−33.77 [−44.60–(−22.94)]	−130.57–36.03

LOA limits of agreement, TVD total vessel density, PVD perfused vessel density, PPV proportion of perfused vessels