Table 3 Intra-observer coefficients of variation (standard errors) for the measurement of the inter-frame mean GSM (un-normalized and NORM1 normalized) and mean area, for eight plaque samples

px2

1.7% (0.24)

2.9% (0.37)

2.3% (0.29)

px4

0.5% (0.18)

2.3% (0.11)

4.4% (1.39)

px11

1.6% (0.48)

1.4% (0.24)

4.7% (1.53)

px26

1.1% (0.22)

1.5% (0.26)

1.2% (0.30)

px21

1.4% (0.32)

2.5% (0.25)

2.4% (0.56)

px22

1.5% (0.45)

2.9% (0.29)

1.7% (0.43)

px12

1.8% (0.44)

3.3% (0.22)

2.4% (0.66)

px5

1.4% (0.23)

2.3% (0.23)

3.3% (0.46)

Column means

1.4% (0.32)

2.4% (0.24)

2.8% (0.70)