Assessment of Dietary Sodium and Potassium in Canadians Using 24-Hour Urinary Collection

详细信息    查看全文

• 作者：Andrew Mente ; PhD^a ; ^b ; ^{andrew.mente@phri.ca" class="auth_mail" title="E-mail the corresponding author} ; Gilles Dagenais ; MD ; MSc^c ; Andreas Wielgosz ; MD ; PhD^d ; Scott A. Lear ; PhD^e ; Matthew J. McQueen ; MB ; PhD^a ; ^f ; Johannes Zeidler ; PhD^f ; Lily Fu ; MSc^f ; Jane DeJesus ; BSc^a ; Sumathy Rangarajan ; MSc^a ; Anne-Sophie Bourlaud ; MSc^c ; Anne Leblanc De Bluts ; RN^c ; Erica Corber ; MPH ; BSc^e ; Veronica de Jong ; BA&Sc ; MSc^e ; Jacob Boomgaardt ; BA^d ; Alexandra Shane ; BA (Hons)^d ; Ying Jiang ; MD ; MSc^g ; Margaret de Groh ; PhD^g ; Martin J. O'Donnell ; MB ; PhD^a ; ^h ; ⁱ ; Salim Yusuf ; DPhil ; FRCPC ; FRSC^a ; ^b ; ^h ; Koon Teo ; MB ; PhD^a ; ^b ; ^h
• 刊名：Canadian Journal of Cardiology
• 出版年：2016
• 出版时间：March 2016
• 年：2016
• 卷：32
• 期：3
• 页码：319-326
• 全文大小：590 K

文摘

Although salt intake derived from data on urinary sodium excretion in free-living populations has been used in public policy, a population study on urinary sodium excretion has not been done in Canada. We assessed dietary sodium and potassium intake using a 24-hour urine collection in a large survey of urban and rural communities from 4 Canadian cities and determined the association of these electrolytes with blood pressure (BP).

Methods

One thousand seven hundred consecutive individuals, aged 37-72 years, attending their annual follow-up visits of the ongoing Prospective and Urban Rural Epidemiology (PURE) study in Vancouver, Hamilton, Ottawa, and Quebec City, Canada, collected a 24-hour urine sample using standardized procedures.

Results

Mean sodium excretion was 3325 mg/d and mean potassium excretion was 2935 mg/d. Sodium excretion ranged from 3093 mg/d in Vancouver to 3642 mg/d in Quebec City, after adjusting for covariates. Potassium excretion ranged from 2844 mg/d in Ottawa to 3082 mg/d in Quebec City. Both electrolytes were higher in men than in women and in rural populations than in urban settings (P < 0.001 for all). Sodium excretion was between 3000 and 6000 mg/d in 48.3% of the participants, < 3000 mg/d in 46.7%, and > 6000 mg/d in only 5%. No significant association between sodium or potassium excretion and BP was found.

Conclusions

Sodium consumption in these Canadians is within a range comparable to other Western countries, and intake in most individuals is < 6000 mg/d, with only 5% at higher levels. Within this range, sodium or potassium levels were not associated with BP.