Table 3 Odds ratio (95% CI) for global cognitive score below 7 across quartiles of iron related dietary pattern among Chinese adults aged ≥55 years old by characteristics, China Health and Nutrition Survey (N = 4852) between 1997 and 2006 ^a

1.00

1.06 (0.86–1.30)

1.24 (0.99–1.54)

1.50 (1.17–1.93)

1.00

1.07 (0.83–1.39)

1.26 (0.96–1.66)

1.54 (1.13–2.10)

0.997

1.00

1.06 (0.75–1.50)

1.26 (0.87–1.82)

1.53 (1.00–2.34)

1.00

1.06 (0.82–1.37)

1.21 (0.92–1.59)

1.59 (1.17–2.15)

0.766

1.00

1.01 (0.73–1.40)

1.27 (0.89–1.80)

1.34 (0.89–2.02)

1.00

1.24 (0.89–1.74)

1.24 (0.86–1.78)

1.32 (0.88–1.98)

0.330

1.00

0.79 (0.55–1.13)

1.03 (0.71–1.49)

1.42 (0.93–2.17)

1.00

1.09 (0.73–1.62)

1.49 (0.96–2.31)

1.84 (1.12–3.02)

1.00

1.27 (0.83–1.95)

1.59 (1.04–2.44)

2.10 (1.35–3.29)

0.497

1.00

1.00 (0.78–1.27)

1.11 (0.85–1.45)

1.24 (0.90–1.70)

1.00

1.52 (0.97–2.39)

1.24 (0.78–1.98)

1.94 (1.21–3.11)

0.323

1.00

0.95 (0.63–1.41)

1.25 (0.82–1.89)

1.29 (0.80–2.08)

1.00

0.94 (0.70–1.25)

1.21 (0.88–1.67)

1.33 (0.89–1.98)

1.00

1.13 (0.83–1.53)

1.28 (0.93–1.76)

1.93 (1.36–2.75)

0.085

1.00

1.00 (0.75–1.32)

1.17 (0.86–1.59)

1.05 (0.73–1.52)