They followed the diets and measured intake -- the low sodium group was instructed to stay under 1,500mg/day -- they didn't quite get there but had substantiall

They followed the diets and measured intake -- the low sodium group was instructed to stay under 1,500mg/day -- they didn't quite get there but had substantially lower sodium intake as compared to the 'control'. The study group decreased median sodium intake by 27% compared to the 'control' group who decreased intake by 2%. There's always a issue of 'the human element' in studies like this where people lie and don't follow instructions but claim they did, but good study design and follow-through typically minimize those issues. > Between baseline and 12 months, the median sodium intake decreased from 2286 mg/day (IQR 1653–3005) to 1658 mg/day (1301–2189) in the low sodium group and from 2119 mg/day (1673–2804) to 2073 mg/day (1541–2900) in the usual care group.