Results
One hundred and twenty subjects completed the study. Two subjects only had one telephone interview and thus two 24 h DR in total. Another three subjects completed all three 24 h DR, but three of their single 24 h DR were lost due to a power failure. Therefore, 115 participants had 3 × 24 h DR and 120 participants had 2 × 24 h DR. Each participant completed all 7 d FDs. One subject was categorised as an outlier with the 7 d FD, and two and one outliers were observed with the 2 × 24 h DR and the 3 × 24 h DR, respectively (EI – TEE > 3 SD away from the mean difference). However, excluding the outliers did not change the results significantly, so we decided to keep the outliers in the analysis.