Table 2 DMF% in 12-year-old Chinese children by gender (%, 95%CI)

21.1 (20.5–21.7)

18.9 (18.1–19.7)

23.4 (22.5–24.3)

 < 0.001

26.0 (25.0–26.9)

22.9 (21.7–24.1)

29.0 (27.7–30.4)

 < 0.001

16.1 (15.3–16.9)

14.8 (13.8–15.9)

17.5 (16.3–18.6)

 < 0.001

27.4 (26.3–28.5)

24.0 (22.5–25.4)

30.8 (29.3–32.4)

 < 0.001

17.3 (16.2–18.3)

14.8 (13.4–16.2)

19.7 (18.2–21.3)

 < 0.001

16.9 (15.9–17.9)

16.5 (15.1–17.9)

17.4 (16.0–18.8)

0.360

15.9 (15.3–16.4)

14.0 (13.3–14.8)

17.7 (16.9–18.5)

 < 0.001

18.0 (17.2–18.8)

16.4 (15.3–17.5)

19.5 (18.3–20.7)

 < 0.001

13.8 (13.0–14.5)

11.6 (10.7–12.6)

15.8 (14.8–16.9)

 < 0.001

22.7 (21.8–23.7)

20.1 (18.8–21.4)

25.3 (23.9–26.6)

 < 0.001

9.7 (8.8–10.5)

9.1 (7.9–10.3)

10.2 (9.0–11.5)

0.187

12.0 (11.1–12.8)

10.4 (9.3–11.5)

13.6 (12.3–14.8)

 < 0.001

16.2 (15.7–16.8)

13.9 (13.2–14.6)

18.6 (17.8–19.4)

 < 0.001

16.8 (16.1–17.6)

14.2 (13.2–15.2)

19.5 (18.3–20.6)

 < 0.001

15.7 (14.9–16.4)

13.6 (12.6–14.6)

17.8 (16.7–18.9)

 < 0.001

20.0 (19.0–20.9)

16.5 (15.3–17.7)

23.6 (22.1–25.0)

 < 0.001

13.9 (12.9–14.9)

12.7 (11.3–14.1)

15.0 (13.5–16.4)

0.032

14.0 (13.2–14.8)

11.9 (10.8–13.0)

16.1 (14.9–17.3)

 < 0.001

21.9 (21.3–22.5)

19.2 (18.4–20.0)

24.6 (23.7–25.5)

 < 0.001

22.5 (21.7–23.4)

19.8 (18.6–21.0)

25.3 (24.0–26.5)

 < 0.001

21.3 (20.4–22.1)

18.7 (17.5–19.8)

23.9 (22.6–25.1)

 < 0.001

20.4 (19.4–21.4)

16.5 (15.2–17.8)

24.3 (22.8–25.8)

 < 0.001

20.7 (19.6–21.9)

18.7 (17.1–20.3)

22.7 (21.0–24.4)

 < 0.001

24.2 (23.2–25.3)

22.3 (20.9–23.7)

26.2 (24.7–27.7)

 < 0.001

24.3 (23.6–24.9)

20.3 (19.5–21.2)

28.2 (27.3–29.1)

 < 0.001

23.8 (22.9–24.7)

19.7 (18.6–20.9)

27.9 (26.5–29.2)

 < 0.001

24.7 (23.8–25.6)

20.9 (19.8–22.1)

28.5 (27.2–29.9)

 < 0.001

28.6 (27.5–29.7)

24.0 (22.5–25.4)

33.2 (31.6–34.8)

 < 0.001

21.4 (20.2–22.6)

17.8 (16.2–19.3)

25.1 (23.3–26.8)

 < 0.001

22.0 (20.9–23.0)

18.6 (17.2–19.9)

25.4 (23.9–26.9)

 < 0.001