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.