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(a) Mean VC, 95% CI, postoperatively in percent of predictive values for patients in different age groups (n = 107; 37–60 years, n = 20; 61–70 years, n = 46; 71–80 years, n = 35; 81–86 years, n = 6); P = 0.04 between all groups. (b) Mean IC, 95% CI, postoperatively in percent of predictive values for different genders and BMI. (n = 107, female n = 21, male n = 86, BMI ≤ 25 n = 42, BMI > 25 n = 65).
