Table 3 Comparison and agreement of pH and specific gravity measures between the visual vs machine read-out, stratified by infection intensity
Parameter | Infection intensity | Mean ± SD from visual read | Mean ± SD from machine read | Mean bias (95% CI) | Pearson’s r |
|---|---|---|---|---|---|
pH | Combined | 7.31 ± 0.97 | 7.44 ± 1.03 | − 0.14 (− 0.20, − 0.08) | 0.88 |
Light infection | 7.37 ± 0.91 | 7.53 ± 1.00 | − 0.16 (− 0.21, − 0.10) | 0.89 | |
Heavy infection | 6.94 ± 1.16 | 6.99 ± 1.05 | − 0.05 (− 0.24, 0.15) | 0.80 | |
Specific gravity | Combined | 1.013 ± 0.007 | 1.018 ± 0.005 | − 0.004 (− 0.005, − 0.004) | 0.72 |
Light infection | 1.013 ± 0.007 | 1.017 ± 0.005 | − 0.004 (− 0.005, − 0.004) | 0.71 | |
Heavy infection | 1.015 ± 0.007 | 1.020 ± 0.006 | − 0.005 (− 0.006, − 0.003) | 0.70 |