Table 4.

Linear regressional result for assessing level of proportional biases in measurements

Measurements	Beta‐value	P‐value
50–99 and 100–199 mL	−0.147	0.55
50–99 and 200–299 mL	−0.525	0.001
50–99 and 300–399 mL	−1.040	0.001