Table 1

Variation within an image

VesselPulse pointNo of photographsGraderMean SD* (μm) (95% CI)†(Min SD*– max SD*)
*SD, standard deviation.
†See statistical analysis section for calculation of confidence intervals.
‡All pulse points combined.
Small arteriole0%10A1.36 (1.0–1.67)(0.69–2.27)
B0.88 (0.57–1.19)(0.40–1.90)
30%10A1.43 (0.99–1.86)(0.92–2.90)
B0.93 (0.55–1.32)(0.44–2.29)
70%10A1.03 (0.76–1.31)(0.59–1.82)
B0.92 (0.52–1.31)(0.40–2.21)
Any‡30A1.27 (1.09–1.46)(0.59–2.90)
B0.91 (0.73–1.09)(0.40–2.29)
Large arteriole0%10A0.87 (0.66–1.09)(0.53–1.56)
B0.87 (0.66–1.07)(0.42–1.27)
30%10A0.89 (0.65–1.13)(0.38–1.48)
B0.97 (0.58–1.35)(0.45–2.30)
70%10A1.21 (0.72–1.70)(0.61–2.57)
B1.03 (0.70–1.36)(0.41–1.89)
Any‡30A0.99 (0.81–1.17)(0.38–2.57)
B0.95 (0.79–1.11)(0.41–2.30)
Small venule0%10A0.93 (0.72–1.15)(0.49–1.37)
B0.93 (0.73–1.13)(0.47–1.39)
30%10A1.22 (0.76–1.68)(0.61–2.51)
B1.02 (0.78–1.27)(0.51–1.68)
70%10A1.17 (0.98–1.37)(0.69–1.58)
B0.99 (0.73–1.24)(0.43–1.56)
Any‡30A1.11 (0.94–1.27)(0.49–2.51)
B0.98 (0.86–1.10)(0.43–1.68)
Large venule0%10A0.71 (0.51–0.91)(0.43–1.30)
B1.01 (0.80–1.21)(0.64–1.68)
30%10A0.96 (0.64–1.29)(0.49–1.96)
B1.00 (0.69–1.32)(0.49–1.67)
70%10A0.96 (0.68–1.24)(0.44–1.56)
B1.03 (0.76–1.30)(0.76–1.99)
Any‡30A0.88 (0.73–1.02)(0.43–1.96)
B1.01 (0.88–1.15)(0.49–1.99)
All vessel typesAny‡30Both1.01 (0.96–1.07)(0.38–2.90)