Fig 2. Correlation and agreement between cycles of passive leg raising (PLR) maneuvers.

A. Patients. B. Volunteers. r–Pearson’s correlation coefficients. K–Cohen’s kappa for agreement in determining fluid responsiveness of “Yes” (ΔSVI > 10%) or “No” (ΔSVI ≤ 10%) between two PLR maneuvers. K was not calculated for volunteers since the consistency in determining fluid responsiveness over all three PLR maneuvers was 96.0% (Table 3).