Table 2 Baseline characteristics of the study subjects (N = 413)
Variables | Men (n = 231) | Women (n = 182) | p for differencea |
|---|---|---|---|
No. (%) of subjects | |||
Ethnicity | .12 | ||
Hispanic | 65 (38.1) | 48 (26.4) | |
Non-Hispanic white | 135 (58.5) | 99 (54.4) | |
Black | 11 (4.8) | 15 (8.2) | |
Asian | 10 (4.3) | 18 (9.9) | |
Other | 10 (4.3) | 2 (1.1) | |
Smoking status | .005 | ||
Current smokers | 76 (32.9) | 39 (21.4) | |
Former smokers | 67 (29.0) | 50 (27.4) | |
Never smokers | 88 (38.1) | 93 (51.2) | |
Mean ± SD | |||
Age (yr) | 49.3 ± 4.5 | 51.9 ± 4.5 | <.0001 |
Body height (m) | 1.76 ± .07 | 1.61 ± .07 | <.0001 |
Body mass index (kg/m2) | 29.0 ± 4.9 | 28.0 ± 6.3 | .002 |
Mean IMTb(μm) | 708.8 ± 96.3 | 682.1 ± 88.0 | <.0001 |
Echogenic layer | 364.4 ± 98.1 | 331.0 ± 67.8 | <0.0001 |
Echogenic layer (% IMT) | 44.5 ± 7.4 | 42.6 ± 7.1 | 0.0093 |
Echolucent layer | 362.9 ± 83.9 | 367.9 ± 91.5 | 0.78 |
Echolucent layer (% IMT) | 50.0 ± 9.3 | 52.3 ± 9.4 | 0.01 |