Table 3 Cumulative incidence of anemia (%) according to WHO and Chinese criteria among adults in rural Deqing

18–34

4(13.3)

3(8.3)

27(67.5)

21(35.1)

31(44.3)

24(25.1)

35–44

32(23.2)

21(12.4)

67(50.0)

51(23.4)

99(36.4)

72(18.6)

45–54

54(32.3)

22(10.5)

84(56.0)

56(25.7)

138(43.5)

78(18.2)

55–64

35(36.8)

19(16.2)

54(58.1)

36(27.3)

89(47.3)

55(22.1)

Total

125(29.1)

65(12.2)

232(55.6)

164(26.1)

357(42.1)

229(19.7)

χ2, p

9.6, 0.023

2.9, 0.412

4.2, 0.247

3.4, 0.334

6.1, 0.105

3.5, 0.324

χ2_trend, p

10.1, 0.018

2.8, 0.422

4.3, 0.232

3.3, 0.351

6.2, 0.103

3.4, 0.338