Table 3.

Perceived oral dryness in eight different intra-oral regions as determined with the Regional Oral Dryness Inventory (RODI) in the total study population

	Mean ± SD	Median ± IQR	Total number of subjects for each intra-oral region
Upper lip	2.84 ± 1.28	3.00 ± 2.00–4.00	449
Posterior part of palatea	3.04 ± 1.30	3.00 ± 2.00–4.00	456
Anterior part of palateb	2.88 ± 1.31	3.00 ± 2.00–4.00	444
Inside cheeksa,b,c	2.51 ± 1.32	2.00 ± 1.00–4.00	447
Lower lipb,d	2.84 ± 1.30	3.00 ± 2.00–4.00	448
Anterior part of tonguea,d,e	2.96 ± 1.33	3.00 ± 2.00–4.00	445
Posterior part of tongued,e	2.99 ± 1.37	3.00 ± 2.00–4.00	452
Floor of the moutha,b,c,e,f,g	2.58 ± 1.35	3.00 ± 1.00–4.00	445

Data are presented as median with corresponding interquartile range (IQR) and as a mean with standard deviation (SD)

^aWilcoxon signed-rank tests: p < 0.05 vs. upper lip

^bWilcoxon signed-rank tests: p < 0.05 vs. posterior palate

^cWilcoxon signed-rank tests: p < 0.05 vs. anterior palate

^dWilcoxon signed-rank tests: p < 0.05 vs. inside cheeks

^eWilcoxon signed-rank tests: p < 0.05 vs. lower lip

^fWilcoxon signed-rank tests: p < 0.05 vs. anterior part of the tongue

^gWilcoxon signed-rank tests: p < 0.05 vs. posterior part of the tongue