Factor Number
in group		 Mouthwash
user (%)a		 Х2 test
P-value
Age (years)
25 - 34 450 56.0 < 0.001
35 - 44 585 48.9
45 - 54 432 42.6
55 - 64 473 39.3
65 - 74 396 36.4
75 + 239 38.9
Gender
Female 1348 47.2 0.004
Male 1227 41.5
Scottish Index of Multiple Deprivation (SIMD Quintile)
1 (most deprived) 89 50.6 < 0.001
2 265 53.2
3 654 48.6
4 850 41.1
5 717 40.7
Education level
Secondary school 1053 44.8 < 0.001
Technical College 712 50.1
University/Postgraduate 741 39.0
Other 48 33.3
Smoking
Currently smoking or have stopped
within the last 12 months		 471 53.1 < 0.001
Stopped smoking over 12 months ago 626 46.5
Never smoked 1364 40.3
Alcohol consumption
Almost everyday 295 36.6 0.012
Once or twice a week 946 46.5
Less than once a week 876 46.2
Do not drink 396 42.2

aUser: every day or once every few days; non-user: less than once a month or never.