Table 1.
Characteristics of Participants, Overall and by Dual-Energy X-Ray Absorptiometry and Doubly Labeled Water Subset, in the Men’s Lifestyle Validation Study, Boston, Massachusetts, 2011–2013
|
Total
(n = 609) |
Completed 1
DXA Scan a (n = 197) |
Completed Repeat
DLW Measurements b (n = 100) |
||||
|---|---|---|---|---|---|---|
| Variable | Mean (SD) | % | Mean (SD) | % | Mean (SD) | % |
| Age, years | 68.1 (7.6) | 61 (8.1) | 62.4 (9.1) | |||
| Height, m | 1.8 (0.1) | 1.8 (0.1) | 1.8 (0.1) | |||
| Weight, kg | 81.7 (12.3) | 83.1 (12.4) | 83 (12.8) | |||
| Weight change, kgc | −0.04 (2.67) | 0.15 (2.94) | 0.0 (3.4) | |||
| Body mass indexd | 26.1 (3.7) | 26.5 (3.7) | 26.5 (3.7) | |||
| Current smokere | 1.2 | 1.0 | 1.0 | |||
| African-American race/ethnicity | 2.3 | 4.6 | 4.0 | |||
| Harvard Pilgrim Health Care member | 28.2 | 85.3 | 72.0 | |||
| Second PAQ | ||||||
| Total activity, MET-hours/day | 10.4 (6.6) | 9.7 (6.9) | 9.4 (7.3) | |||
| MVPA, MET-hours/day | 7.4 (5.5) | 6.9 (5.5) | 6.9 (5.7) | |||
| Sedentary time, hours/day | 4.6 (2.9) | 5.5 (3.2) | 5.2 (3) | |||
| First DLW PAL | 1.7 (0.2) | 1.8 (0.3) | 1.8 (0.3) | |||
Abbreviations: DLW, doubly labeled water; DXA, dual-energy x-ray absorptiometry; MET, metabolic equivalent of task; MVPA, moderate-to-vigorous physical activity; PAL, physical activity level; PAQ, physical activity questionnaire; SD, standard deviation.
a DXA was conducted in a subset of participants residing in the Boston area (n = 197).
b A subgroup (n = 100) of participants in group 1 completed a second DLW measurement at approximately 9, 12, or 15 months.
c Weight change was calculated as the difference in reported weight between administration of the first and second PAQs; data were missing for 1 participant.
d Weight (kg)/height (m)2.
e Data on current smoking were missing for 5 men.