Characteristics Group 2a
N (%)
Group 3b
N (%)
Ever used mouthwash
No 12 (16.44) 10 (38.46)
Yes 61 (83.56) 16 (61.54)
Current use of mouthwash
Never used 12 (16.44) 10 (38.46)
Used in the past 16 (21.92) 5 (19.23)
Current use/1 year ago 45 (61.64)c 11 (42.31)d
Years of using mouthwash
≤ 5 years 20 (58.82) 1 (14.29)
6 - 15 years 8 (23.53) 3 (42.86)
16 - 25 years 3 (8.82) 2 (28.57)
25 years 3 (8.82) 1 (14.29)
Missing 11 4
Frequency of use
< Once/week 11 (24.44) 3 (27.27)
Once or twice/week 7 (15.56) 2 (18.18)
Every other day 4 (8.89) 1 (9.09)
Once/day 12 (26.67) 2 (18.18)
Twice/day 11 (24.44) 2 (18.18)
Three times/day - 1 (9.09)
Time interval between brushing teeth and use of mouthwash
< 1 min 29 (64.44) 6 (54.55)
About 5 min 11 (24.44) 3 (27.27)
About 1 hour 2 (4.44) -
About 2 hours 1 (2.22) -
Other 2 (4.44) 2 (18.18)
Dilute mouthwash
No 42 (93.33) 9 (81.82)
Yes 3 (6.67) 2 (18.18)
Amount of mouthfuls
Only one 40 (88.89) 11 (100)
Two or more 5 (11.11) -
Time kept in mouth
A few seconds (≤ 20 sec.) 19 (44.19) 6 (54.55)
Longer (> 20 sec.) 24 (55.81) 5 (45.45)
Missing 2 -
Swallow mouthwash
No 45 (100) 11 (100)
Yes - -
Mouthwash contains alcohole
No 21 (51.22) 3 (27.27)
Yes 25 (60.98) 8 (72.73)
Missing 4 -
Glasses of wine equivalent rinsed per year
(users of alcohol containing mouthwash)
1 - 25 13 (52) 5 (62.5)
26 - 50 5 (20) -
51 - 100 3 (12) 2 (25)
101 - 150 - -
151 - 200 3 (12) -
200 1 (4) 1 (12.5)
Years rinsed with one glass of wine equivalent per day
(users of alcohol containing mouthwash)
0.0 - 0.4 13 (68.42) 2 (40)
0.5 - 0.9 2 (10.53) -
1 - 1.9 2 (10.53) 2 (40)
2 - 2.9 - 1 (20)
3 2 (10.53) -
Missing 6 3

aGroup 2 are participants who filled in the mouthwash use questionnaire.
bGroup 3 are controls of the Feasibility Head and Neck Cancer Study.
cQuestionnaire asked for the current use of mouthwash.
dGroup 3 was asked about mouthwash use one year ago.
eNumbers do not add up to total, because 5 participants in the Mouthwash Use project used two different mouthwash brands.