TABLE 3.

Energy difference between 24-hour recalls and DLW/7-day average by number recalls: The Energy Study (N = 79), Worcester, Massachusetts, June–October 1997

	Energy intake Mean (SD)	Energy difference: Recall-DLW Mean (SD)	Energy difference: Recall-7 day avg. Mean (SD)
Energy expenditure from DLW	2114.8 (405.7)
7-Day 24-hour recalls average	1825.6 (466.7)
Calls
1	1672.3 (508.4)	−442.5 (563.6)^*	−153.4 (393.2)^a
2	1768.8 (536.5)	−346.0 (576.5)^†	−56.8 (270.1)^b
3	1815.1 (575.5)	−299.7 (603.2)^‡	−10.5 (247.4)^c
4	1848.0 (529.1)	−266.9 (542.7)^‡	22.3 (165.3)^c
5	1849.1 (508.9)	−265.8 (545.4)^‡	23.4 (139.4)^c
6	1827.0 (483.5)	−287.9 (531.3)^‡	−1.3 (78.6)^c
7	1825.6 (466.7)	−289.2 (512.9)^‡	–

SD = standard deviation; DLW = doubly labeled water.

^{*, †, ‡, a, b, c}

Value with the same marker was significantly different by paired t test.