Table 2 shows the factors affecting self-rated oral health in the elderly living in the community. The logistic regression analysis revealed that age, gender, education level, income, living status, oral function, oral health behavior and HRQOL were all associated with self-rated oral health. Only the residential area of a participant was not associated with self-rated oral health. In the age group of 65–69 years, 70–74 years (OR = 0.877, 95% CI 0.831–0.926,
p < 0.001), 75–79 years (OR = 0.787, 95% CI 0.742–0.835,
p < 0.001), and 80 years (OR = 0.725, 95% CI 0.678–0.776,
p < 0.001), the increased levels of self-rated oral health were associated with better outcomes. Males were more likely to report a lower level of self-rated oral health than females (OR = 1.233, 95% CI 1.173–1.295,
p < 0.001). There was no significant difference according to the residential area (OR = 0.976, 95% CI 0.928–1.027,
p = 0.353). Educational level was more likely to be associated with self-rated oral health, which increased in the following order: illiteracy, elementary school (OR = 0.919, 95% CI 0.868–0.974,
p = 0.004), middle school (OR = 0.918, 95% CI 0.851–0.990,
p = 0.026), high school (OR = 0.831, 95% CI 0.768–0.901,
p < 0.001), college or higher level (OR = 0.748, 95% CI 0.677–0.827,
p < 0.001). Elderly individuals with a monthly income of more than 6,000,000 won, were more likely to have better self-rated oral health than elderly participants with a monthly income of less than 500,000 won (OR = 0.865, 95% CI 0.763–0.980,
p = 0.023). Living with a spouse was rated as healthy compared with those who were separated (OR = 1.073, 95% CI 1.021–1.128,
p = 0.006). Lower oral function self-rated oral health scores were observed in participants who showed discomfort during mastication (OR = 8.501, 95% CI 8.111–8.911,
p < 0.001) and pronunciation (OR = 2.117, 95% CI 1.966–2.280,
p < 0.001), and those using dentures (OR = 3.527, 95% CI 3.377–3.683,
p < 0.001). In oral health behavior, brushing after lunch (OR = 1.071, 95% CI 1.023–1.122,
p = 0.004), after dinner (OR = 1.052, 95% CI 1.002–1.105,
p = 0.043), and before sleep (OR = 1.055, 95% CI 1.008–1.104,
p = 021) had a positive impact on self-rated oral health. HRQOL including pain/discomfort (OR = 1.197, 95% CI 1.137–1.260,
p < 0.001), mobility (OR = 1.166, 95% CI 1.097–1.240,
p < 0.001), self-care (OR = 1.096, 95% CI 1.022–1.176,
p < 0.001), usual activities (OR = 1.099, 95% CI 1.028–1.174,
p = 0.005), and anxiety/depression (OR = 1.162, 95% CI 1.098–1.231,
p < 0.001) affected self-rated oral health.