Table 1 Sample characteristics and prevalence of poor oral health between Australians and Americans aged 65 + years across two time points (weighted)

Age

 65–74 years

52.4 (50.1–54.7)

55.0 (50.4–59.5)

56.7 (54.8–58.7)

58.7 (52.7–64.8)

 75 + years

47.6 (45.3–49.9)

45.0 (40.5–49.6)

43.3 (41.3–45.2)

41.3 (35.2–47.3)

Sex

 Male

44.9 (43.0–46.9)

43.2 (40.8–45.6)

46.7 (44.9–48.7)

44.8 (42.2–47.4)

 Female

55.1 (53.1–57.0)

56.8 (54.4–59.2)

53.3 (51.3–55.2)

55.2 (52.6–57.8)

Ethnicity

 White

96.4 (95.6–97.2)

82.8 (76.8–88.7)

91.4 (89.9–92.8)

76.1 (69.9–82.3)

 Non-White

3.6 (2.8–4.4)

17.2 (11.3–23.2)

8.6 (7.2–10.1)

23.9 (17.7–30.1)

Educational attainment

 University or equivalent

13.7 (12.0–15.4)

17.1 (14.1–20.1)

12.1 (10.9–13.4)

32.6 (24.9–40.4)

 Non-University of equivalent

86.3 (84.6–88.0)

82.9 (79.7–85.9)

87.9 (86.6–89.1)

67.4 (59.6–75.1)

Household income

 Lowest

16.1 (14.5–17.7)

18.4 (14.0–22.8)

14.5 (12.9–16.1)

12.8 (10.7–15.0)

 Lower

38.1 (35.8–40.3)

23.2 (19.2–27.1)

37.2 (35.0–39.4)

20.4 (15.5–25.3)

 Higher

21.2 (19.3–23.0)

29.5 (25.9–33.1)

27.4 (25.3–29.4)

25.8 (20.1–31.6)

 Highest

24.6 (22.2–27.0)

28.9 (23.4–34.4)

20.9 (18.9–22.9)

40.10 (30.6–51.3)

Last dental visit

 12 + months ago

45.8 (43.4–48.3)

46.5 (39.7–53.3)

41.5 (39.2–43.7)

32.2 (27.6–36.8)

 < 12 months ago

54.2 (51.7–56.6)

53.5 (46.7–60.3)

58.5 (56.3–60.8)

67.7 (63.2–72.4)

Total number for exam

1043

1372

1269

1328

 % Edentulism

27.6 (25.6–29.6)

27.3 (21.1–33.5)

15.2 (13.8–16.6)

13.4 (9.7–17.1)

 % Non-functional dentition

48.4 (44.4–52.4)

61.0 (53.5–68.4)

41.4 (37.0–45.8)

40.8 (34.1–47.6)

 Mean number of missing teeth

13.2 (12.7–13.6)

18.1 (17.5–18.7)

10.9 (10.5–11.2)

13.5 (12,9–14.0)