The high sodium condiments and pre-packaged food should be the focus of dietary sodium control in the adult Shanghai population

Table 1 Demographics of the surveillance subjects

Season	Sample size (person-time)				Gender (n)		Age (years) (mean ± SD)
Season	Total	Urban	Suburban	Rural	Male	Female	Age (years) (mean ± SD)
Spring	1503	703	367	433	750	753	54.6 ± 17.0
Summer	1448	669	361	418	710	738	54.6 ± 16.9
Autumn	1444	666	359	419	722	722	54.0 ± 16.9
Winter	1423	658	352	413	700	723	54.5 ± 16.8
All	5818	2696	1439	1683	2882	2936	54.4 ± 16.9

ISSN: 1743-7075