Table 3.

ORs (95% CI) of the factors associated with NRT <20 (n=531†)

Variables/values	Model 1	Model 2	Model 3
	OR (95% CI)	OR (95% CI)	OR (95% CI)
Age (years)	1.08 (1.06 to 1.09)*	1.07 (1.05 to 1.08)*	1.07 (1.05 to 1.10)*
Gender
Female‡
Male	0.70 (0.50 to 0.99)*	§	§
Educational attainment
>9 years‡
≤9 years	3.72 (2.49 to 5.56)*	2.01 (1.28 to 3.14)*	1.96 (1.23 to 3.10)*
Hypertension
No‡	–	–	–
Yes	2.32 (1.62 to 3.31)*	1.61 (1.09 to 2.39)*	1.73 (1.15 to 2.60)*
Diabetes mellitus
No‡	–	–	–
Yes	1.69 (1.13 to 2.52)*	§	§
Hyperlipidaemia
No‡	–	–	–
Yes	0.81 (0.57 to 1.13)	§	§
Disability classification
Physical disability‡	–	–	–
Intellectual disability	0.79 (0.50 to 1.25)	2.20 (1.26 to 3.84)*	2.30 (1.30 to 4.08)*
Hearing impairment	1.12 (0.69 to 1.83)	0.76 (0.44 to 1.32)	0.75 (0.43 to 1.32)
Vision impairment	1.87 (0.99 to 3.49)	1.54 (0.75 to 3.13)	1.48 (0.72 to 3.04)
Capability of ADL
Independent‡	–	–	–
Dependent	1.17 (0.68 to 2.02)	§	§
Oral health behaviours¶
Daily brushing teeth
Frequent‡	–	–	–
Infrequent	1.12 (0.77 to 1.61)	§	§
Using dental floss
Often‡	–	–	–
Seldom	2.64 (1.60 to 4.37)*	2.22 (1.28 to 3.83)*	2.12 (1.21 to 3.71)*
Visiting dentist
Regular‡	–	–	–
Irregular	1.42 (0.94 to 2.16)	§	§
Water intake
Sufficient‡	–	–	–
Insufficient	1.37 (0.97 to 1.95)	§	§
Five nutrition groups per day
Balanced‡	–	–	–
Unbalanced	1.53 (1.08 to 2.17)*	1.58 (1.07 to 2.34)*	§
Smoking habit
Never or formerly‡	–	–	–
Current users	0.96 (0.65 to 1.42)	§	§
Alcohol habit
Never or formerly‡	–	–
Current users	0.91 (0.57 to 1.46)	§	§

Model 1: crude; model 2: adjusted for age, gender and education; model 3: model 2+all variables in this table.

*p Value<0.05.

†18 missing data.

‡Reference group.

§Variables were not selected into the model.

¶Variables reflects edentulous subjects’ recall of their behaviours when dentate.

ADL, activities of daily living; NRT, number of remaining teeth.