Revista nº 815

Anatomic variations of the healthy colon | Fernando J, et al. 20 Actual Med.2022;107(815):18- 26 variance (ANOVA) or the Kruskal-Wallis test was used to compare differences between the means or ranges of three or more groups, according to whether the distributions were normal or not. If statistically significant differences were identified after applying the last two tests, the analysis was continued by applying a posteriori two-by-two contrasts—using the Bonferroni method for homoscedastic samples or Dunnett's T3 test for heteroscedastic samples when having used the ANOVA test—or the Mann- Whitney U statistic if the Kruskal-Wallis test was used. To quantify the degree of relationship between quantitative variables, the Pearson's linear correlation coefficient (r) was used, considering the central limit theorem to consider sample normality. Statistical significance was considered to have been achieved with p-values <0.05. RESULTS Sample description The study included 130 patients, of which 75 (57.69%) were men and 55 (42.31%) were women. The mean age of the study participants was 64.32 ± 16.41 years, and the mean BMI was 28.41 ± 5.49. In the 75 men, the mean age was 63.40 ± 15.43 years, and the BMI range was 28.53 (IQR: 5.71). In the group of 55 women, the mean age was 65.54 ± 17.72 years, and the BMI range was 24.09 (IQR: 8.56) There were no significant differences between the two groups (p=0.526 and p= 0.448 respectively). Morphological analysis Individual morphological analysis showed substantial anatomical variability of the reconstructed colon, as demonstrated in several of the most representative anatomical cases. Analysis of morphometric variables by sex When comparing morphometric variables between men and women, only three variables were greater in women than in men, which were statistically significant for the distance PUBIS - IMA (16.62 vs. 17.98 cm), and the angle HF - IMA - SF (105.21º vs. 106.28º), but not significant for the distance PUBIS - SMA. The other morphometric variables were greater in men and were statistically significant for the distances SMA - IMA (7.14 vs. 6.32 cm), PUBIS - SF (29.70 vs. 27.76 cm), PUBIS - ICJ (14.63 vs. 12.75 cm), SMA - SF (10.92 vs. 7.06 cm), IMA - HF (11.28 vs. 9.60 cm), and IMA - SF (14.54 vs. 11.38 cm) (Table 1). Analysis of morphometric variables by age In comparisons of the morphometric variables between the two age groups (65 years or younger and over 65 years), of the three statistically significant differences, the distance PUBIS - SMA (9.10 vs. 10.95 cm) and the angle HF - PUBIS - SF (36.05º vs. 39.12º) were higher in the age group over 65 years, whereas the distance PUBIS - IMA (17.61 vs. 16.81 cm) was higher in the under 65 years age group (Table 2). Figure 1. Location of the variables proposed in this study as reference points and useful for length and angle measurements. A. Proposed reference points. B. Proposed length measurements PUBIS – SMA, PUBIS – IMA, SMA – IMA, PUBIS – HF, PUBIS – SF, PUBIS – ICJ, PUBIS – SDJ, SMA - HF, SMA – SF, IMA – HF, IMA – SF. C. Proposed angle measurements HF - PUBIS – SF, HF - SMA – SF, HF - IMA – SF.