Table 5.
Sample sizes, rates, and hazard ratios for mortality from all-causes and diseases of the circulatory system among participants aged > = 20 years after excluding prevalent self-reported diabetes, cardiovascular disease, and cancer, National Health and Nutrition Examination Survey 1999-2002-2006
| Screen time (hours per day) | |||||||
|---|---|---|---|---|---|---|---|
| < 1 | 1 | 2 | 3 | 4 | > = 5 | P for trend | |
| All-causes | |||||||
| Unweighted no. deaths/no. at risk | 21/744 | 32/967 | 48/1565 | 46/1010 | 22/611 | 41/719 | -- |
| Unweighted person-years | 4232 | 5617 | 9096 | 5843 | 3534 | 3963 | -- |
| Age-adjusted rate/1,000 PY (95% CI) | 5.4 (1.1, 9.6) | 5.9 (3.0, 8.9) | 5.0 (3.8, 6.1) | 8.1 (5.3, 10.8) | 4.1 (2.1, 6.2) | 8.6 (5.8, 11.5) | -- |
| Model 1 (hazard ratio, 95% CI) | 1.00 | 1.04 (0.46, 2.34) | 1.02 (0.48, 2.14) | 1.62 (0.63, 4.12) | 0.80 (0.33, 1.94) | 1.85 (0.86, 3.98) | 0.051 |
| Model 2 (hazard ratio, 95% CI) | 1.00 | 1.06 (0.46, 2.40) | 1.00 (0.48, 2.09) | 1.60 (0.65, 3.95) | 0.77 (0.33, 1.81) | 1.71 (0.82, 3.57) | 0.091 |
| Model 3 (hazard ratio, 95% CI) | 1.00 | 1.08 (0.48, 2.45) | 0.98 (0.48, 2.01) | 1.49 (0.61, 3.64) | 0.72 (0.30, 1.72) | 1.45 (0.69, 3.06) | 0.325 |
| Model 4 (hazard ratio, 95% CI) | 1.00 | 1.12 (0.50, 2.53) | 1.03 (0.51, 2.09) | 1.48 (0.62, 3.52) | 0.71 (0.30, 1.68) | 1.33 (0.65, 2.74) | 0.592 |
| Model 5 (hazard ratio, 95% CI) | 1.00 | 1.11 (0.49, 2.53) | 1.01 (0.49, 2.08) | 1.47 (0.62, 3.50) | 0.70 (0.30, 1.64) | 1.29 (0.63, 2.64) | 0.634 |
| Diseases of the circulatory system | |||||||
| Unweighted no. deaths/no. at risk | 6/744 | 8/967 | 10/1565 | 15/1010 | 9/611 | 15/719 | -- |
| Unweighted person-years | 4232 | 5617 | 9096 | 5843 | 3534 | 3963 | -- |
| Age-adjusted rate/1,000 PY (95% CI) | 1.1 (0.1, 2.2) | 1.1 (0.0, 2.2) | 0.6 (0.0, 1.4) | 2.3 (0.7, 3.9) | 1.3 (0.4, 2.3) | 3.5 (1.0, 6.1) | -- |
| Model 1 (hazard ratio, 95% CI) | 1.00 | 1.04 (0.19, 5.62) | 0.52 (0.11, 2.41) | 1.46 (0.42, 5.05) | 0.89 (0.25, 3.17) | 2.68 (0.83, 8.70) | 0.071 |
| Model 2 (hazard ratio, 95% CI) | 1.00 | 1.05 (0.19, 5.74) | 0.57 (0.12, 2.73) | 1.58 (0.45, 5.50) | 0.96 (0.27, 3.43) | 2.58 (0.80, 8.32) | 0.074 |
| Model 3 (hazard ratio, 95% CI) | 1.00 | 1.10 (0.21, 5.78) | 0.58 (0.12, 2.76) | 1.55 (0.42, 5.68) | 0.93 (0.26, 3.28) | 2.45 (0.72, 8.35) | 0.101 |
| Model 4 (hazard ratio, 95% CI) | 1.00 | 1.22 (0.22, 6.96) | 0.67 (0.14, 3.15) | 1.77 (0.50, 6.33) | 1.07 (0.29, 3.93) | 2.58 (0.75, 8.82) | 0.081 |
| Model 5 (hazard ratio, 95% CI) | 1.00 | 1.47 (0.24, 8.81) | 0.75 (0.16, 3.42) | 2.04 (0.54, 7.70) | 1.43 (0.34, 6.07) | 3.17 (0.86, 11.63) | 0.042 |
CI = confidence interval; PY = person-years
Model 1 is adjusted for age
Model 2 is adjusted for age, gender, race or ethnicity, educational attainment
Model 3 is adjusted for variables in model 2 plus smoking status, leisure-time physical activity, Healthy Eating Index score, and alcohol consumption
Model 4 is adjusted for variables in model 3 plus health status and health insurance coverage
Model 5 is adjusted for variables in model 5 plus body mass index, systolic blood pressure, and concentrations of high-density lipoprotein cholesterol, non-high-density lipoprotein cholesterol, and HbA1c