Table 4.
The scores of the 11 Xerostomia Inventory items (XI), presented as median with the corresponding interquartile range (IQR), and the mean with standard deviation (SD). N is the total numbers of participants
| Median | IQR | Mean | SD | N | |
|---|---|---|---|---|---|
| XI 1 (sip liquids to swallow food) | 2.0 | 1.0–4.0 | 2.61 | 1.59 | 336 |
| XI 2 (mouth dry when eating a meal) a | 3.0 | 1.0–4.0 | 2.93 | 1.46 | 329 |
| XI 3 (get up night to drink) a,b | 3.0 | 2.0–5.0 | 3.19 | 1.49 | 336 |
| XI 4 (my mouth feels dry) a,b,c | 4.0 | 3.0–5.0 | 3.84 | 1.30 | 334 |
| XI 5 (difficulty eating dry foods) a,d | 3.0 | 1.0–5.0 | 3.03 | 1.59 | 336 |
| XI 6 (suck sweets to relieve dry mouth) b,c,d,e | 2.0 | 1.0–4.0 | 2.69 | 1.64 | 336 |
| XI 7 (difficulty swallowing certain foods) b,c,d,e | 2.0 | 1.0–4.0 | 2.55 | 1.52 | 337 |
| XI 8 (the skin of my face feels dry) a,c,d,e,g | 3.0 | 1.0–4.0 | 2.80 | 1.47 | 334 |
| XI 9 (my eyes feel dry) a,d,f,g,h | 3.0 | 1.0–5.0 | 3.05 | 1.58 | 337 |
| XI 10 (my lips feel dry) a,b,c,d,e,f,g,h,i | 4.0 | 3.0–5.0 | 3.63 | 1.34 | 337 |
| XI 11 (the inside of my nose feels dry) a,c,d,f,g,j | 3.0 | 1.0–4.0 | 2.91 | 1.54 | 335 |
| XI total | 33.0 | 22.5–43.0 | 32.94 | 11.88 | 337 |
Wilcoxon signed-rank tests: ap < 0.05 vs XI 1, bp < 0.05 vs XI 2, cp < 0.05 vs XI 3, dp < 0.05 vs XI 4, ep < 0.05 vs XI 5, fp < 0.05 vs XI 6, gp < 0.05 vs XI 7, hp < 0.05 vs XI 8, ip < 0.05 vs XI 9, jp < 0.05 vs XI 10