Figure 2.

Bland–Altman comparison between 8-color and 7-color Uc charts (n = 189). The 8-color Uc chart remake was based on colors adapted from Armstrong et al. (1994) and the 7-color Uc chart developed by our lab, the Athleat Field Lab; by Wardenaar and Bacalzo in 2019. The size of the bubbles indicates the percentage of urine color scores, small black dots represent 1% values, and circled dots represent 2–3% values. The average reporting bias is indicated by the dark grey dotted line, and the 95% limits of agreement are indicated by the light grey dotted lines.