Table 1.

Items of the Xerostomia Inventory-Dutch version and their Pearson’s correlation coefficients (R) with the latent variable ‘xerostomia’

Item number	Proposition	R
1	I sip liquids to aid in swallowing food	0.55
2	My mouth feels dry when eating a meal	0.63
3	I get up at night to drink	–
4	My mouth feels dry	0.62
5	I have difficulty in eating dry foods	0.63
6	I suck sweets or cough lollies to relieve dry mouth	0.37
7	I have difficulties swallowing certain foods	0.61
8	The skin of my face feels dry	0.58
9	My eyes feel dry	0.49
10	My lips feel dry	0.68
11	The inside of my nose feels dry	–