Characteristics Study group Control group P-valuea
N (%) N (%)
Xerostomia 45 (81.8) 10 (18.2) 0.0001
Hyposalivation 44 (80) 12 (21.8) 0.0001

aStatistically significant at the level P < 0.05 (Pearson's Chi-Square and Fischer's Exact test).