Vitamin B12 is associated negatively with anemia in older Chinese adults with a low dietary diversity level: evidence from the Healthy Ageing and Biomarkers Cohort Study (HABCS)

Table 3 Logistic regression for association of different types of anemia with VB12 status under different DDS

Variables	Unadjusted		Basic model^a		Final Model^b
Variables	*OR(95%CI***)	P	*OR(95%CI***)	P	*OR(95%CI***)	P
All macrocytic anemia (N = 130)	0.55 (0.38–0.79)	0.001	0.62 (0.43–0.90)	0.011	0.66 (0.45–0.98)	0.038
Macrocytic anemia with low DDS (N = 77)	0.42 (0.25–0.71)	0.009	0.46 (0.27–0.77)	1.295	0.49 (0.29–0.84)	0.001
Macrocytic anemia with high DDS (N = 53)	0.75 (0.43–1.31)	0.312	0.89 (0.51–1.56)	0.680	0.98 (0.54–1.78)	0.941
All normocytic anemia (N = 483)	0.72 (0.59–0.88)	0.002	0.81 (0.66–1.00)	0.046	0.79 (0.63–0.98)	0.035
Normocytic anemia with low DDS (N = 275)	0.70 (0.53–0.92)	0.010	0.75 (0.57–1.00)	0.046	0.71 (0.53–0.96)	0.024
Normocytic anemia with high DDS (N = 208)	0.77 (0.57–1.04)	0.085	0.90 (0.66–1.23)	0.490	0.91 (0.66–1.27)	0.588
All microcytic anemia (N = 16)	1.02 (0.38–2.73)	0.969	1.12 (0.42–3.01)	0.826	1.16 (0.40–3.36)	0.782
Microcytic anemia with low DDS (N = 11)	0.99 (0.30–3.25)	0.983	1.08 (0.33–3.59)	0.896	1.06 (0.32–3.53)	0.921
Microcytic anemia with high DDS (N = 5)	0.78 (0.13–4.69)	0.786	0.76 (0.13–4.65)	0.768	0.62 (0.06–7.04)	0.703
All microcytic hypochromic anemia (N = 62)	0.48 (0.28–0.82)	0.007	0.52 (0.30–0.89)	0.018	0.59 (0.32–1.07)	0.083
Microcytic hypochromic anemia with low DDS (N = 41)	0.48 (0.24–0.95)	0.035	0.50 (0.25–1.00)	0.049	0.58 (0.27–1.24)	0.159
Microcytic hypochromic anemia with high DDS (N = 21)	0.52 (0.21–1.26)	0.148	0.60 (0.24–1.47)	0.263	0.60 (0.23–1.59)	0.306

^aBasic model,adjusted for age,gender
^bFinal model, adjusted for age, gender, race, education levels, current marital status, physic activity habits, smoking habits, tea drinking habits, BMI

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