Table 6.
Comparison of variables between recruited and not recruited, according to first measures
| Recruited (completed HHS) (N=10968)** | Not recruited (N=31221) | Difference* (Recruited vs. Not) | ||||
|---|---|---|---|---|---|---|
| N | Mean (SD) or % | N | Mean (SD) or % | Mean (SE) or % | P for diff | |
| Sex | ||||||
| Male | 4832 | 44.1% | 16149 | 51.7% | −7.6% | <0.001 |
| Female | 6136 | 55.9% | 15072 | 48.3% | ||
| Race | <0.001 | |||||
| White | 9880 | 90.1% | 24989 | 80.0% | 10.1% | |
| Black | 1006 | 9.2% | 5548 | 17.8% | −8.6% | |
| Other | 82 | 0.7% | 684 | 2.2% | −1.5% | |
| Age, year | 10968 | 10.4 (4.0) | 31221 | 9.5 (3.3) | 0.9 (0.1) | <0.001 |
| Age range at first visit | ||||||
| Early childhood (3–11 year) | 6444 | 58.8% | 22431 | 71.8% | −13.0% | <0.001 |
| Adolescence (12–19 year) | 4524 | 41.2% | 8790 | 28.2% | ||
| Body mass index, kg/m2 | 10944 | 18.3 (3.6) | 31091 | 18.0 (3.5) | 0.3 (0.1) | <0.001 |
| Weight, kg | 10947 | 39.2 (17.2) | 31102 | 35.6 (15.5) | 3.6 (0.2) | <0.001 |
| Height, cm | 10944 | 142.3 (21.6) | 31104 | 137.5 (18.8) | 4.8 (0.2) | <0.001 |
| Total cholesterol, mmol/L | 9301 | 4.63 (0.97) | 21847 | 4.21 (0.75) | 0.42 (0.01) | <0.001 |
| Low-density lipoprotein cholesterol, mmol/L | 7027 | 2.97 (0.89) | 15855 | 2.48 (0.67) | 0.49 (0.01) | <0.001 |
| High-density lipoprotein cholesterol, mmol/L | 7091 | 1.52 (0.38) | 16048 | 1.51 (0.45) | 0.01 (0.01) | 0.27 |
| Triglycerides, mmol/L | 9201 | 0.79 (0.41) | 21096 | 0.79 (0.41) | 0.00 (0.01) | 0.83 |
| Systolic blood pressure, mmHg | 9888 | 108.4 (13.4) | 25933 | 102.6 (12.7) | 5.8 (0.2) | <0.001 |
| Diastolic blood pressure phase V, mmHg | 9805 | 62.2 (13.8) | 25837 | 54.7 (15.0) | 7.5 (0.2) | <0.001 |
| Glucose, mmol/L | 4355 | 4.69 (0.78) | 11150 | 4.65 (0.59) | 0.04 (0.01) | <0.001 |
| Insulin, umol/l | 5210 | 10.20 (7.45) | 7567 | 10.10 (8.63) | 0.10 (0.15) | 0.50 |
SD: standard deviation; SE: standard error of the mean difference; HHS: Heart Health Survey
*
All differences, except high-density lipoprotein cholesterol, triglycerides and insulin, are significant (P<0.05). Differences in proportion or mean values (standard error) were present
**
All Young Finns Study participants are included here, because the Finnish registry includes cardiovascular disease ascertainment in everyone; 2041 attended in 2010–12 and have other information that was included in the HHS
Statistical comparisons across cohorts were done using Chi-square for categorical variables and t-test for continuous variables.