Table 4

Sample sizes, rates, and hazard ratios for mortality from all-causes and diseases of the circulatory system among participants aged > = 20 years, National Health and Nutrition Examination Survey 1999-2002-2006

Screen time (hours per day)


< 2

2- < 4

> = 4

P for trend


All-causes

Unweighted no. deaths/no. at risk

122/2088

223/3367

197/1895

--

Unweighted person-years

11,892

19,218

10,393

--

Age-adjusted rate/1,000 PY (95% CI)

8.7 (6.4, 10.9)

9.1 (7.5, 10.7)

11.0 (8.8, 13.2)

--

Model 1 (hazard ratio, 95% CI)

1.00

1.18 (0.87, 1.60)

1.47 (1.15, 1.89)

0.003

Model 2 (hazard ratio, 95% CI)

1.00

1.17 (0.86, 1.58)

1.37 (1.09, 1.73)

0.014

Model 3 (hazard ratio, 95% CI)

1.00

1.14 (0.84, 1.55)

1.24 (0.96, 1.59)

0.134

Model 4 (hazard ratio, 95% CI)

1.00

1.18 (0.87, 1.59)

1.13 (0.88, 1.44)

0.712

Model 5 (hazard ratio, 95% CI)

1.00

1.16 (0.86, 1.55)

1.08 (0.85, 1.38)

0.962

Model 6 (hazard ratio, 95% CI)

1.00

1.16 (0.86, 1.56)

1.14 (0.90, 1.44)

0.589

Model 4: Exclude prevalent diabetes, cardiovascular disease, cancer

1.00

1.15 (0.69, 1.92)

0.96 (0.63, 1.47)

0.406

Model 5: Exclude deaths in year 1

1.00

1.20 (0.89, 1.61)

1.11 (0.86, 1.42)

0.917

Diseases of the circulatory system

Unweighted no. deaths/no. at risk

46/2088

74/3367

70/1895

--

Unweighted person-years

11,892

19,218

10,393

--

Age-adjusted rate/1,000 PY (95% CI)

3.3 (2.0, 4.6)

2.7 (1.8, 3.5)

3.2 (2.4, 4.1)

--

Model 1 (hazard ratio, 95% CI)

1.00

0.82 (0.48, 1.40)

1.05 (0.72, 1.53)

0.388

Model 2 (hazard ratio, 95% CI)

1.00

0.84 (0.48, 1.46)

1.00 (0.68, 1.48)

0.606

Model 3 (hazard ratio, 95% CI)

1.00

0.86 (0.49, 1.54)

0.96 (0.62, 1.48)

0.880

Model 4 (hazard ratio, 95% CI)

1.00

0.90 (0.50, 1.64)

0.87 (0.55, 1.36)

0.578

Model 5 (hazard ratio, 95% CI)

1.00

0.96 (0.54, 1.71)

0.88 (0.53, 1.45)

0.555

Model 6 (hazard ratio, 95% CI)

1.00

0.98 (0.56, 1.71)

0.96 (0.60, 1.52)

0.845

Model 4: Exclude prevalent diabetes, cardiovascular disease, cancer

1.00

1.07 (0.46, 2.47)

1.65 (0.75, 3.62)

0.186

Model 5: Exclude deaths in year 1

1.00

1.00 (0.55, 1.84)

0.84 (0.48, 1.46)

0.418


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 4 plus histories of diabetes, cardiovascular disease, and cancer

Model 6 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

Ford BMC Public Health 2012 12:70   doi:10.1186/1471-2458-12-70

Open Data