Edict of postoperative fever and atelectasis.

Figure 3. Bland-Altman plot between total serum cortisol and free serum cortisol (57 patients). Limits of agreement, 2 33.966 to 2 4.596; mean difference, 2 19.281; 95% CI, 2 21.229 to 2 17.333; range, 2.495-25.825; Pitman test r , 2 0.981; P 5 0.001. diffi cult and time consuming (see the “Discussion” section in original article 1 ). Even more important is the observation that the degree of agreement is better when the free serum cortisol concentration is low, which is more relevant to considering corticosteroid replacement (see the “Discussion” section in original article 1 ). We have constructed three Bland-Altman plots for review. The fi rst plot ( Fig 1 ) is the relationship between free serum cortisol and salivary cortisol. The second plot ( Fig 2 ) is the relationship between salivary cortisol  2.5 m g/dL and free serum cortisol 2.0 m g/dL. We chose those values based on Annane et al, 2