Table 3 Stepwise approach to examine zinc/iron ratio as an independent predictor of a new diagnosis of diabetes
Quintile of zinc to iron ratio | ||||||
|---|---|---|---|---|---|---|
Q1 | Q2 | Q3 | Q4 | Q5 | P | |
Number of women | 1785 | 1784 | 1784 | 1784 | 1784 | |
Zinc/Iron ratio [median(min, max)] | 0.69 (0.28, 0.77) | 0.84 (0.77, 0.90) | 0.95 (0.90, 1.00) | 1.06 (1.00, 1.12) | 1.21 (1.12, 1.75) | |
Number of diabetics | 60 | 72 | 71 | 65 | 65 | |
Odds ratio | ||||||
• Age adjusted | 1.00 | 1.21 (0.85 to 1.71) | 1.19 (0.84 to 1.70) | 1.09 (0.76 to 1.56) | 1.09 (0.76 to 1.56) | 0.885 |
• Age & non-dietary† factors adjusted | 1.00 | 0.91 (0.61 to 1.33) | 0.91 (0.62 to 1.34) | 0.73 (0.49 to 1.09) | 0.74 (0.50 to 1.10) | 0.073 |
• Age, non-dietary† and dietary‡ factors adjusted | 1.00 | 0.76 (0.50 to 1.16) | 0.71 (0.46 to 1.11) | 0.54 (0.33 to 0.86) | 0.50 (0.30 to 0.83) | 0.003 |
• Age, non-dietary† and dietary‡ factors adjusted plus alcohol intake and use of supplements | 1.00 | 0.75 (0.50 to 1.14) | 0.72 (0.46 to 1.12) | 0.54 (0.34 to 0.87) | 0.50 (0.30 to 0.83) | 0.004 |