Table 3:

Relationship of Preoperative Tidal Volumes to Postoperative Tidal Volumes

Note.—Data in parentheses are 95% confidence intervals. Data were adjusted for predicted title volume on the basis of age. To determine tidal volume change, the following equation was used: postoperative tidal volume (mL) − preoperative tidal volume (mL). Cohen (d) effect size for mean difference is defined as the difference of two population means divided by the standard deviation estimated from pooled data. Bonferroni correction is used to account for multiple comparisons. Bonferroni correction with P value of .05/6 = .008. Outcomes are correlated (r = 0.77). Bonferroni adjusted for correlation – 0.033.