Table 2 Pearson correlation coefficients (r-values) between the objective and the subjective measures of one of the evaluators computed without grouping for factors and also grouping for calibration and smartphone.

From: Comparison of different smartphone cameras to evaluate conjunctival hyperaemia in normal subjects

 

Correlation Subjective vs Objective

Relative Redness

RGdiff

RBdiff

RedHue

All factors together (without grouping)

0.43*

0.51*

0.46*

0.51*

PreCalibration

Bq

0.70*

0.85*

0.84*

0.73*

Iphone

0.79*

0.74*

0.69*

0.73*

Nexus

0.63*

0.35

0.34

0.61*

PostCalibration

Bq

0.59*

0.71*

0.76*

0.68*

Iphone

0.75*

0.86*

0.75*

0.79*

Nexus

0.61*

0.43

0.21

0.69*

  1. *Statistically significant (p < 0.05). RGdiff.: Red-Green difference. RBdiff.: Red-Blue difference.
Back to article page