Influence of warning labels on daily salt consumption and arterial pressure

Abstract

Prekomjerni unos kuhinjske soli je jedan od vodećih čimbenika rizika krvožilnih bolesti. Cilj istraživanja je bio ispitati utjecaj naljepnica upozorenja, postavljenih na kućne spremnike soli, na dnevni unos soli u Mostaru (Bosna i Hercegovina). Uključeno je 150 odraslih, liječenih hipertoničara, nasumice podijeljenih u dvije skupine: kontrolna je dobila samo letak s upozorenjem o štetnosti prekomjernog unosa soli, a interventna i naljepnice upozorenja. Mjerena je 24 satna natriurija (Na 24) i arterijski tlak, na početku istraživanja, te jedan i dva mjeseca kasnije. Ishodni Na24 iznosio je 209,2±78,3 mmol/dan ili 12,3 ± 4,6 g NaCl-a, bez razlika među skupinama (P= 0,745). Nakon jedan i dva mjeseca u interventnoj skupini Na24 je pao na 183 ± 63 i 176 ± 55 mmol (P< 0,001), a u kontrolnoj na 203 ± 60 i 200 ± 58 (P= 0,147). Ukupno sniženje srednjeg arterijskog tlaka je u kontrolnoj skupini iznosilo prosječno 0,7 mm Hg, a u interventnoj 3,6 mm Hg (P= 0,375). Unos soli je neprihvatljivo visok, čak i u liječenih hipertoničara. Primjenom naljepnica upozorenja taj se unos može bitno smanjiti, no postignuti uspjeh je ipak nedostatan, a dugoročni ishodi nepoznati.Excessive salt intake is a major cardiovascular risk factor. Examined was the impact of enhanced warning on daily salt intake in Mostar (Bosnia and Herzegovina). A sample of 150 treated hypertensives was randomized in a group receiving a leaflet about the harmful effects of excessive salt, and a group receiving in addition warning stickers for household salt containers. Blood pressure (BP) and 24 h urinary sodium excretion (Na24) were measured at the start of the trial, and one and two months later. The average starting Na24 was 209,2 ± 78.3 mmol, equivalent to 12.3 ± 4.6 g NaCl, and similar inboth subgroups (P= 0.745). One month and two months later a significant decrease was observed in the intervention group (to 183 ± 63 and 176 ± 55 mmol; P<0.001) but not in the control group (to 203 ± 60 and 200± 58 mmol; P= 0.147). A noticeable decrease in BP (by some 3.6 mm Hg in mean BP; P= 0.375) was observed in the intervention group only. Salt intake is unacceptably high, even among treated hypertensive subjects. Enhanced warning achieved a marked reduction in Na24 and BP. However, these results are still insufficient and the long-term effects are unknown

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