Table 1.
Demographic characteristics of the study population at enrollment (n=1136)
| Characteristic | Study population (n=551) | Workers excluded from the analysis a (n=585) |
|---|---|---|
| Age (years), mean (SD) | 31.2 (10.6) | 29.7 (10.0) |
| Body mass index, mean (SD) | 29.7 (7.0) | 28.4 (6.3) |
| Gender, n (%) | ||
| Male | 343 (62) | 402 (69) |
| Female | 208 (38) | 183 (31) |
| Race, n (%) | ||
| White | 360 (65) | 343 (59) |
| Hispanic | 5 (1) | 3 (<1) |
| Black/African American | 166 (30) | 214 (37) |
| Asian/Asian American | 10 (2) | 13 (2) |
| Other | 8 (1) | 11 (2) |
| Missing | 2 (<1) | 1 (<1) |
| Job category, n (%) | ||
| Construction | 188 (34) | 262 (45) |
| Technical | 59 (11) | 66 (11) |
| Office/Clerical | 159 (29) | 76 (13) |
| Service | 145 (26) | 181 (31) |
Abbreviations: SD, standard deviation.
a
Reasons for exclusion: loss to follow-up, missing either a study baseline or follow-up questionnaire, incomplete DASH-W at either baseline or follow-up, did not meet the minimum two year follow-up time between study baseline and follow-up.