Table 1.
Baseline Means (SDs) or Percentages in Analytic Sample: Full Sample and by Tertile of Total Activity Counts. National Health and Nutrition Examination Survey, United States, 2003-2006.
| Overall | Tertile 1 (Least) |
Tertile 2 | Tertile 3 (Most) |
P for trend |
|
|---|---|---|---|---|---|
| (n=3,029) | (n=1,011) | (n=1,009) | (n=1,009) | ||
| Sociodemographic characteristics | |||||
| Age (years) | 61.3 (8.4) | 65.9 (9.0) | 61.1 (8.2) | 58.1 (6.4) | <.001 |
| Female (%) | 53.4% | 54.5% | 53.0% | 53.0% | 0.486 |
| White (%) | 79.5% | 79.4% | 79.5% | 79.7% | 0.869 |
| Black (%) | 9.4% | 11.8% | 8.5% | 8.5% | 0.011 |
| Hispanic (%) | 6.6% | 4.4% | 6.1% | 8.7% | <.001 |
| < HS education (%) | 9.4% | 14.2% | 8.3% | 6.7% | 0.028 |
| > HS education (%) | 26.7% | 21.7% | 28.7% | 28.8% | 0.027 |
| Health behaviors and prevalent conditions | |||||
| Current smoker (%) | 18.5% | 22.6% | 18.3% | 15.6% | 0.006 |
| BMI (kg/m2) | 29.0 (6.2) | 30.6 (7.5) | 29.3 (6.2) | 27.6 (4.8) | <.001 |
| Diabetes (%) | 14.6% | 26.1% | 13.5% | 6.8% | <.001 |
| CHD (%) | 7.3% | 13.7% | 6.4% | 3.2% | <.001 |
| CHF (%) | 4.8% | 11.2% | 2.7% | 1.8% | <.001 |
| Stroke (%) | 4.5% | 9.5% | 2.9% | 2.1% | <.001 |
| Cancer (%) | 15.5% | 21.4% | 13.7% | 12.7% | <.001 |
| Mobility lim. (%) | 16.0% | 29.6% | 15.5% | 6.1% | <.001 |
| Daily physical activity | |||||
| Sedentary minutes | 533 (138) | 616 (148) | 538 (112) | 467 (118) | <.001 |
| Light minutes | 322 (99) | 220 (69) | 321 (53) | 401 (75) | <.001 |
| MVPA minutes | 16 (18) | 3 (3) | 11 (7) | 30 (20) | <.001 |
| Valid minutes of wear time | 871 (121) | 839 (138) | 869 (111) | 898 (111) | <.001 |
| Counts from Sed. (thousands) | 8.2 (2.2) | 7.8 (2.4) | 8.5 (2.1) | 8.2 (1.9) | 0.011 |
| Counts from Light (thousands) | 167.8 (73.2) | 88.6 (31.9) | 159.8 (26.5) | 235.1 (56.4) | <.001 |
| Counts from MVPA (thousands) | 47.8 (62.3) | 8.3 (10.4) | 29.8 (23.7) | 93.7 (73.7) | <.001 |
| Total counts (thousands) | 223.8 (113.9) | 104.7 (35.1) | 198.2 (27.8) | 337.0 (88.3) | <.001 |
Abbreviations: SD, standard deviation; T, Tertile; HS, High School; BMI, Body Mass Index; CHD, Coronary Heart Disease; CHF, Congestive Heart Failure; Sedentary, <100 counts per minute; MVPA, Moderate-to-vigorous physical activity (>2,019 counts per minute); Minutes, minutes per day.
Mobility lim. = any difficulty walking 1/4 mile or walking up ten steps.
Means, percentages, and SDs are survey-weighted.
Minimum and maximum total daily counts, by sex and tertile:
Males: Tertile 1, (14,665, 160,580); Tertile 2, (160,590, 260,860); Tertile 3, (261,710, 877,750).
Females: Tertile 1, (20,173, 148,250); Tertile 2, (148,380, 225,170); Tertile 3, (225,500, 913,000).