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Table 2 Selected age-adjusted baseline characteristics among adults aged > = 20 years, by level of screen time, National Health and Nutrition Examination Survey 1999-2002

From: Combined television viewing and computer use and mortality from all-causes and diseases of the circulatory system among adults in the United States

  Screen time (hours per day)
  < 1 1 2 3 4 > = 5  
Characteristics Mean or% (95% CI) Mean or% (95% CI) Mean or% (95% CI) Mean or% (95% CI) Mean or% (95% CI) Mean or% (95% CI) P for trend
Age (years) 43.6 (42.6, 44.6) 43.0 (41.7, 44.3) 45.3 (44.3, 46.2) 46.8 (45.4, 48.1) 47.3 (45.8, 48.7) 46.4 (45.4, 47.3) < 0.001
Men,% 46.1 (42.7, 49.5) 46.4 (43.2, 49.6) 51.1 (48.1, 54.1) 50.7 (47.2, 54.1) 53.0 (49.1, 56.8) 48.6 (45.3, 51.8) 0.012
Whites,% 72.9 (67.3, 78.0) 74.1 (69.8, 78.0) 75.3 (70.7, 79.4) 74.7 (69.9, 79.0) 71.0 (66.1, 75.5) 67.0 (62.3, 71.4) 0.013
> High school,% 58.9 (55.4, 62.4) 58.4 (53.7, 63.1) 54.0 (50.1, 57.9) 52.1 (47.6, 56.5) 47.7 (42.4, 53.2) 43.2 (39.7, 46.7) < 0.001
Current smoker,% 19.6 (15.6, 24.2) 16.5 (13.4, 20.2) 22.1 (19.0, 25.6) 29.2 (25.6, 33.1) 29.1 (26.4, 31.8) 35.0 (31.6, 38.5) < 0.001
Leisure-time physical activity (min/month) 443.2 (319.6, 566.8) 336.3 (276.6, 396.0) 337.8 (296.4, 379.1) 323.2 (272.0, 374.4) 257.0 (207.2, 306.9) 198.8 (165.1, 232.5) 0.043
Alcohol intake (g) 10.2 (7.9, 12.4) 12.0 (9.5, 14.5) 12.0 (9.4, 14.6) 10.4 (8.7, 12.0) 13.0 (9.3, 16.7) 12.8 (8.4, 17.3) 0.881
Healthy Eating Index score 65.4 (64.2, 66.6) 65.2 (64.1, 66.4) 64.1 (62.9, 65.3) 62.6 (61.6, 63.5) 63.4 (61.9, 64.8) 60.9 (59.9, 61.9) < 0.001
Body mass index (kg/m2) 26.5 (26.0, 27.0) 27.2 (26.6, 27.9) 27.8 (27.4, 28.2) 28.0 (27.4, 28.7) 29.4 (28.8, 30.1) 28.9 (28.3, 29.5) < 0.001
Systolic blood pressure (mm Hg) 121.8 (120.5, 123.1) 122.5 (121.3, 123.8) 122.9 (121.8, 124.0) 123.7 (122.5, 124.9) 124.9 (123.0, 126.8) 124.4 (122.9, 125.8) 0.007
High-density lipoprotein cholesterol (mg/dl) 53.0 (52.0, 53.9) 52.3 (50.7, 53.8) 50.9 (49.7, 52.0) 50.4 (49.3, 51.6) 50.0 (48.1, 51.9) 48.9 (47.4, 50.4) 0.001
Non-high-density lipoprotein cholesterol (mg/dl) 147.3 (143.6, 150.9) 149.7 (146.1, 153.3) 153.7 (150.8, 156.6) 153.8 (150.7, 156.9) 153.0 (149.0, 156.9) 155.0 (151.8, 158.2) 0.001
HbA1c (%) 5.4 (5.3, 5.4) 5.4 (5.4, 5.5) 5.4 (5.4, 5.5) 5.5 (5.4, 5.5) 5.5 (5.4, 5.6) 5.6 (5.5, 5.7) 0.039
Excellent or very good health,% 62.7 (59.5, 65.9) 60.7 (54.9, 66.2) 57.1 (54.1, 60.0) 53.5 (50.2, 56.8) 44.2 (39.5, 49.0) 42.8 (38.6, 47.2) < 0.001
Health insurance coverage,% 83.7 (80.4, 86.5) 84.0 (80.6, 86.9) 84.9 (82.5, 87.1) 82.0 (79.7, 84.1) 81.5 (77.5, 84.8) 75.7 (71.7, 79.3) 0.001
Diagnosed diabetes,% 5.1 (3.6, 7.2) 4.8 (3.3, 6.8) 5.7 (4.7, 6.7) 7.1 (5.4, 9.2) 7.2 (5.8, 8.8) 9.4 (7.4, 11.9) 0.001
History of cardiovascular disease,% 6.5 (4.8, 8.7) 7.4 (5.9, 9.3) 7.7 (6.3, 9.3) 7.9 (6.8, 9.2) 7.4 (6.1, 8.8) 14.8 (12.7, 17.3) < 0.001
History of cancer,% 7.1 (5.1, 9.6) 7.1 (5.1, 9.8) 7.5 (6.3, 8.9) 8.6 (7.1, 10.5) 7.4 (5.7, 9.6) 9.6 (7.5, 12.3) 0.159