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. 2013 Feb 8;3(2):e002106. doi: 10.1136/bmjopen-2012-002106

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Mean sodium intake (mg/day) by socioeconomic group (n=4487)*Significantly different from high socioeconomic status (SES) (p < 0.001). **Significantly different from high SES (p< 0.05). †SES as defined by the highest level of education attained by the primary carer.