Table 1.
Differences in Sample Characteristics by Waist Circumference Category
| Characteristic | Total Sample | Low WC | High WC | P Valuea |
|---|---|---|---|---|
| N | 6,279 | 2,353 | 3,926 | |
| M(SD) | M(SD) | M(SD) | ||
| Age years | 68.9 (6.09) | 69.2 (6.17) | 68.7 (6.03) | .0004 |
| Education years | 12.3 (3.30) | 12.4 (3.39) | 12.2 (3.26) | .0022 |
| Comorbidities | 2.7 (1.22) | 2.6 (1.23) | 2.8 (1.21) | .0001 |
| Waist Circumference (cm) | 100.1 (14.69) | 87.3 (8.88) | 107.8 (11.86) | .0001 |
| Sex N(%) | <.0001 | |||
| Male | 2875 (45.8) | 1666 (70.8) | 1209 (30.8) | |
| Female | 3404 (54.2) | 687 (29.2) | 2717 (69.2) | |
| Race N(%)b | .05 | |||
| White | 5106 (81.3) | 1947 (82.7) | 3159 (80.5) | |
| Black | 1015 (16.2) | 352 (15.0) | 663 (16.9) | |
| Other | 158 (2.5) | 54 (2.3) | 104 (2.7) | |
| Current Smoker N(%) | 1517 (24.2) | 615 (26.1) | 902 (23.0) | .006 |
| Active N(%) | 3429 (54.6) | 1392 (59.2) | 2037 (51.9) | <.0001 |
| Body Mass Index N(%)b | <.0001 | |||
| Normal | 1523 (24.5) | 1156 (50.4) | 367 (9.4) | |
| Overweight | 2310 (37.2) | 910 (39.7) | 1400 (35.7) | |
| Obese | 2385 (38.4) | 229 (10.0) | 2156 (55.0) |
Abbreviations: WC=waist circumference; M=mean; SD=standard deviation
a
Chi-square for categorical variables and t-test for continuous variables used to determine P values.
b
Totals may not add up to 100% due to rounding.