Although salt intake was not measured in these participants, the fact that the average salt intake in a random sample of the population fell by 15% during the same period suggests that the falls in BP would be largely attributable to the reduction in salt intake rather than antihypertensive medications.
Design Using an interviewer-administered survey, we examined women for folate knowledge and the relation of folate knowledge to intake in a random sample.
In a separate structural equation model, the fish variable was assumed to be a sum of true nutrient intake and a random measurement error.
Salt intake in a random sample of the population was measured by 24 h urinary sodium excretion verified using para-aminobenzoic acid recovery method to ensure the accuracy of the collection.
They have used a fixed-effect model for the majority of the analyses; however, they analysed data on change in total dietary fat intake using a random-effects model due to evidence of significant heterogeneity.
To assess the dietary adherence across the intervention, dietary intake was assessed in a random sample of 50% of the participants by a review of the 5-day diet record at baseline and by 24-h recall during a telephone interview on 3 nonconsecutive days at 6 months and 2 years.
In these cases, we first pooled across levels of intake within the study using a random effects model to derive a single relative risk for drinkers versus non-drinkers.
Tables 4 and 5 illustrate the variation in nutrient and food group intake data obtained in a random subset of 1159 men and 1340 women, respectively, depending on whether text matching of milks, breakfast cereals, and baking and frying fats was applied.
Repeated measures of glucose and insulin (at 0, 30, and 120 min during the OGTT) were analyzed by a random-effects mixed model with a random slope of time since glucose intake.
The average salt intake, as measured by 24 h urinary sodium excretion in a random sample of the adult population, was 9.5±0.2 g/day in 2003.
