Figure 3.

Box plot of the evolution of the Gingival Index (GI) scores in both study groups from day 1 (baseline) to day 28 of intensive care unit (ICU) admission. GI classification: 0–1.0, light gingivitis; 1.1–2.0, moderate gingivitis; 2.1–3.0, severe gingivitis. P values refer to the comparison of GI scores between the study groups evaluated on the same day (Mann–Whitney test with Bonferroni correction). Interaction between time and group allocation as a determinant of the GI evolution during the ICU stay (P < 0.001) was evaluated using non-parametric analysis of variance (ANOVA) for repeated measures.