The association between PA/sedentary behaviors categories and baseline prevalence of obesity, impaired fasting glucose (2000–2002), and T2DM incidence from 2002 to 2012 in MESA
| Activity categories* | Baseline prevalence of obesity (%) | Baseline prevalence of impaired fasting glucose (%) | T2DM incidence rate per 1000 person-years | Rate ratios (per 1 unit change) |
|---|---|---|---|---|
| Walking pace | ||||
| None or casual (<2 mph) | 39.8 | 19.2 | 15.3 (13.4, 17.5) | 0.76 (0.68, 0.85)§ |
| Average (2–4 mph) | 28.2 | 15.1 | 10.8 (9.6, 12.0) | |
| Brisk or striding (>4 mph) | 20.7§ | 12.9§ | 9.0 (7.5, 10.7)§ | |
| Exercise PA | ||||
| Quartile 1 (0.00–2.63) | 36.4 | 17.7 | 13.2 (11.4, 15.2) | 0.89 (0.83, 0.96)‡ |
| Quartile 2 (2.64–14.00) | 30.6 | 16.4 | 12.5 (10.8, 14.5) | |
| Quartile 3 (14.01–34.63) | 27.2 | 14.7 | 10.3 (8.8, 12.2) | |
| Quartile 4 (34.64–621) | 23.3§ | 13.6‡ | 9.6 (8.2, 11.3)‡ | |
| Moderate–vigorous PA PA≥3 METs | ||||
| Quartile 1 (0.00–34.25) | 32.5 | 18.0 | 13.6 (11.7, 15.7) | 0.96 (0.90, 1.03) |
| Quartile 2 (34.26–68.75) | 25.4 | 16.2 | 10.0 (8.5, 11.8) | |
| Quartile 3 (68.76–125.5) | 29.7 | 14.2 | 10.4 (8.9, 12.2) | |
| Quartile 4 (125.51–1722.0) | 30.1 | 14.1‡ | 11.8 (10.2, 13.7) | |
| Vigorous PA PA≥6 METs | ||||
| No vigorous PA | 31.1 | 17.0 | 12.4 (11.3, 13.6) | 0.77 (0.65, 0.91)§ |
| Any vigorous PA | 26.0§ | 12.9§ | 9.5 (8.2, 11.0)‡ | |
| Leisure sedentary behavior (hours/day) | ||||
| 0 to 2 | 24.7 | 13.4 | 9.2 (8.0, 10.7) | 1.21 (1.12, 1.31)§ |
| 2.01 to 4 | 29.8 | 16.3 | 11.1 (9.8, 12.6) | |
| 4.01 to 6 | 32.3 | 16.7 | 13.7 (11.6, 16.1) | |
| >6 | 37.7§ | 18.0‡ | 15.9 (12.9, 19.5)§ | |
| TV watching (hours/day) | ||||
| 0 to 2 | 26.1 | 14.0 | 10.0 (9.0, 11.0) | 1.36 (1.21, 1.52)§ |
| 2.01 to 4 | 34.4 | 17.4 | 13.0 (11.3, 14.9) | |
| 4.01 to 6 | 37.4 | 21.7 | 16.5 (13.1, 20.7) | |
| >6 | 43.8§ | 18.8§ | 31.7 (16.5, 61.0)§ | |
| Activity score¶ | ||||
| 1 | 36.8 | 19.2 | 16.6 (13.0, 21.3) | 0.93 (0.88, 0.97)‡ |
| 2 | 30.3 | 17.9 | 12.0 (9.6, 15.1) | |
| 3 | 31.1 | 16.5 | 11.3 (9.4, 13.6) | |
| 4 | 29.3 | 15.5 | 11.6 (10.0, 13.5) | |
| 5 | 27.8 | 15.6 | 12.0 (10.0, 14.4) | |
| 6 | 26.2 | 13.0 | 8.5 (6.7, 10.7) | |
| 7 | 26.6§ | 11.4§ | 9.4 (6.9, 12.8)‡ | |
*PA measures in MET-hours/week unless noted.
†p<0.05.
‡p<0.0.
§p<0.001, NS—not statistically significant (statistical significance: p for trend using the log-rank test).
¶Activity score was created by coding quartiles of moderate-to-vigorous PA 1 (lowest quartile) to 4 (highest quartile) and reverse coding leisure sedentary behavior 3 (lowest quartile) to 0 (highest quartile).
MESA, Multi-Ethnic Study of Atherosclerosis; PA, physical activity; T2DM, type 2 diabetes mellitus; TV, television.