Table 1.
Characteristics of study participants versus non-participants as well as at-risk participants (ie, baseline scan negative) with follow-up scans versus those without; mean(SD) and percent(number). Columns are compared by t-test and Fisher’s exact test where appropriate.
| Eligible for Sleep Subtudy | Participants with Zero Baseline Calcification | |||||
|---|---|---|---|---|---|---|
| Non-participants | Participants | p-value | Rescanned | Not rescanned | p-value | |
| N | 144 | 670 | 495 | 72 | ||
| Self-Reported Sleep (hr) | 6.5(1.4) | 6.5(1.2) | .745 | 6.5(1.2) | 6.5(1.4) | .574 |
| Measured Sleep (hr) | - | 6.1(1.1) | - | 6.1(1.0) | 6.1(1.3) | .925 |
| Baseline Calcification Prevalence | 9.9%(13) | 7.6%(47) | .378 | - | - | - |
| Followup Calcification Incidence | 14.5%(11) | 12.3%(61) | .597 | 12.3%(61) | - | - |
| Race-Sex Groups | .002 | .292 | ||||
| White Male | 30.6%(44) | 26.4%(177) | 25.7%(127) | 38.5%(20) | ||
| Black Male | 26.4%(38) | 16.1%(108) | 15.6%(77) | 23.6%(17) | ||
| White Female | 17.3%(25) | 27.9%(198) | 30.1%(149) | 26.4%(19) | ||
| Black Female | 25.7%(37) | 29.6%(187) | 28.7%(142) | 22.2%(16) | ||
| Age | 39(3.7) | 40(3.6) | .048 | 40(3.5) | 39(3.9) | .042 |
| Current Smokers | 20.8%(30) | 21.0%(141) | .999 | 18.2%(90) | 27.8%(20) | .078 |
| High Density Lipoprotein (mg/dl)* | 50(15) | 51(15) | .690 | 52(15) | 48(12) | .023 |
| Low Density Lipoprotein (mg/dl)* | 115(32) | 113(32) | .458 | 111(30) | 118(34) | .114 |
| Systolic Blood Pressure (mmHg) | 112(13) | 111(14) | .492 | 110(14) | 112(12) | .355 |
| Diagnosed Diabetes | 7.6%(11) | 10.6%(29) | .072 | 4.4%(22) | 5.6%(4) | .841 |
| Framingham Ten-Year Risk% | 1.6(1.8) | 1.8(2.6) | .394 | 1.7(2.3) | 2.1(3.7) | .215 |
*
1 mmol/l high-density or low-density lipoprotein cholesterol= 39 mg/dl