Table 1.
Demographics of the echocardiogram population.
| Characteristic | Normal (n=4587) | Stage 1 DD (n=1676) | p-value |
|---|---|---|---|
| Ages (years) | |||
| 40–45 | 1449 (32%) | 257 (15%) | <.00011 |
| 45–50 | 1605 (35.0%) | 475 (28%) | |
| 50–55 | 1533 (33%) | 944 (57%) | |
| Men | 1920 (42%) | 769 (46%) | 0.0091 |
| Women | 2663 (58%) | 907 (54%) | |
| White | 3617 (79%) | 1261 (75%) | <.00011 |
| Black | 635 (14%) | 306 (18%) | |
| Unknown | 335 (7%) | 109 (7%) | |
| Duration prior to TTE (years)2 | 2.9 (0.6–5.5) | 2.6 (0.4–5.3) | |
| Duration post TTE (years)2 | 2.7 (0.1–7.7) | 2.4 (0.1–7.6) | |
| Systolic blood pressure (mmHg)3 | 123 ± 17 | 130 ± 20 | <0.00014 |
| Diastolic blood pressure (mmHg)3 | 75 ± 11 | 79 ± 13 | <0.00014 |
| Heart rate (beats per minute)3 | 79 ± 16 | 85 ± 17 | <0.00014 |
| Body mass index (kg/m2)3 | 30.4 ± 7.9 | 33.5 ± 8.4 | <0.00014 |
| Creatinine level (mg/dl)3 | 0.85 (0.70–1.03) | 0.92 (0.77–1.16) | <0.00014 |
| Serum glucose (mg/dl)3 | 97 (87–114) | 106 (92–136) | <0.00014 |
Notes:
1
P-values are from a chi-square test evaluating the distributions across age, gender and racial groups among individuals with normal versus stage 1 DD.
2
Median (interquartile range) number of years of patient data available prior to or after the TTE.
3
Values are mean (standard deviation) except for creatinine and glucose which are median (interquartile range).
4
P-value from a linear regression model adjusting for age, gender, self-reported race and setting. Log-transformed values were analyzed for creatinine and glucose.