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Dai Q, Shu X-O, Deng X, et al. Modifying effect of calcium/magnesium intake ratio and mortality: a population-based cohort study. BMJ Open 2013;3:e002111. The column headings in tables 15 have shifted, resulting in incorrectly labelled column headers.

Table 1

Baseline lifestyle factors and demographics by intakes of calcium and magnesium, the Shanghai Women's Health Study (SWHS) and the Shanghai Men Health Study (SMHS), 1996–2009

Table 2

HRs and 95% Confidence Intervals (95% CIs) for total mortality, and mortality due to cardiovascular diseases and cancer by tertiles of calcium and magnesium among women in Shanghai

Table 3

HR and 95% Confidence Intervals (95% CIs) for total mortality, and mortality due to cardiovascular diseases by tertiles of calcium and magnesium among men in Shanghai

Table 4

HR and 95% Confidence Intervals (95% CIs) for total mortality, and mortality due to cardiovascular diseases by calcium and magnesium intake among men in Shanghai

Table 5

HR* and 95% Confidence Intervals (95% CIs) for total mortality by tertiles of calcium and magnesium intake among women and men stratified by the median intake of magnesium and calcium, respectively

Table 1: The first level column heading of ‘Magnesium (mg/day)’ should be shifted right to align with ‘251–<320’.

Table 2: The first level column heading of ‘Calcium intake (mg/day)’ encompasses the columns ‘<408’ to ‘p for interaction’, and then ‘Magnesium intake (mg/day)’ encompasses the remaining columns from ‘<251’ onwards.

Table 3: The first level column heading of ‘Calcium intake (mg/day)’ encompasses the columns ‘<408’ to ‘p for interaction’, and then ‘Magnesium intake (mg/day)’ encompasses the remaining columns from ‘<251’ onwards. The second level column headings should be shifted right by one column, so that ‘<408’ aligns with ‘77215.85’ in column 2.

Table 4: The first level column heading of ‘Calcium intake (mg/day)’ encompasses the columns ‘<408’ to ‘p for interaction’, and then ‘Magnesium intake (mg/day)’ encompasses the remaining columns from ‘<251’ onwards. The line starting with the second ‘Ratio>1.7*’ should be moved one line up while ‘1.7)’ in the blank line should move one line up. The third ‘Ratio≤1.7*’ should be moved up one line and aligned with the third ‘Ratio>1.7*’ while the line starting with the third ‘Ratio>1.7*’ should be moved up one line into the blank line. The fourth ‘Ratio>1.7*’ should be moved up one line and aligned with the fourth ‘Ratio≤1.7*’.

Table 5: The first level column heading of ‘Calcium intake (mg/day)’ encompasses the columns ‘<408’ to ‘p for interaction’. The column heading of ‘Magnesium intake (mg/day)’ encompasses the columns ‘<251’ to ‘p for interaction’.

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