Table 2.
Incidence rates of adult obesity by period
| 2001–2005 | 2005–2009 | 2009–2013 | 2013–2017 | IRR for 2013–2017 vs. 2001–2005 |
|
|---|---|---|---|---|---|
| Overall | 34.1 (31.0, 37.2) | 36.4 (33.5, 39.3) | 34.5 (32.1, 37.0) | 40.7 (37.7, 43.6) | 1.18 (1.06, 1.30) |
| Sex | |||||
| Females | 30.9 (27.2, 34.6) | 35.6 (32.1, 39.1) | 33.7 (30.3, 37.2) | 38.1 (34.3, 41.9) | 1.21 (1.04, 1.41) |
| Males | 37.6 (33.2, 42.0) | 37.1 (32.3, 42.0) | 35.6 (32.0, 39.3) | 44.0 (39.6, 48.4) | 1.17 (1.02, 1.35) |
| Race | |||||
| White | 31.6 (28.3, 34.9) | 33.8 (30.8, 36.8) | 32.0 (29.0, 35.0) | 39.1 (35.8, 42.4) | 1.23 (1.10, 1.38) |
| Blacks | 60.3 (49.6, 71.02) | 62.0 (49.6, 74.3) | 61.4 (51.5, 71.2) | 57.9 (47.2, 68.6) | 0.96 (0.76, 1.21) |
| Other | 37.0 (24.2, 49.8) | 38.2 (25.2, 51.2) | 33.5 (24.0, 43.0) | 41.6 (28.2, 55.0) | 1.12 (0.85, 1.49) |
| Age group | |||||
| 20–29 y | 37.6 (31.2, 43.9) | 34.0 (29.2, 38.7) | 32.6 (27.1, 38.0) | 41.6 (35.2, 48.0) | 1.11 (0.88, 1.39) |
| 30–39 y | 38.4 (32.0, 44.8) | 35.5 (29.3, 41.8) | 37.8 (32.4, 43.3) | 46.4 (40.0, 53.0) | 1.21 (0.99, 1.48) |
| 40–49 y | 34.3 (28.5, 40.0) | 40.2 (33.9, 46.4) | 39.2 (33.5, 44.9) | 44.8 (36.6, 52.9) | 1.31 (1.03, 1.65) |
| 50–59 y | 37.6 (31.8, 43.4) | 37.6 (31.1, 44.0) | 34.2 (29.4, 39.0) | 46.6 (39.3, 54.0) | 1.24 (0.98, 1.57) |
| 60–69 y | 27.7 (18.2, 37.3) | 38.6 (29.3, 47.9) | 28.4 (22.3, 34.5) | 35.4 (28.4, 42.4) | 1.28 (0.88, 1.86) |
| 70+ y | 24.5 (17.1, 31.8) | 29.1 (20.9, 37.3) | 30.2 (21.6, 38.9) | 22.1 (15.2, 28.9) | 0.90 (0.60, 1.36) |
| Education | |||||
| < High school | 44.8 (35.6, 54.1) | 55.8 (47.1, 64.5) | 46.1 (37.2, 55.0) | 50.3 (39.5, 61.0) | 1.12 (0.88, 1.43) |
| High school | 38.1 (33.3, 42.9) | 45.1 (37.8, 52.3) | 45.8 (39.8, 51.7) | 50.1 (43.6, 56.6) | 1.32 (1.10, 1.57) |
| > High school | 30.6 (26.9, 34.4) | 30.9 (27.6, 34.2) | 28.7 (26.0, 31.5) | 36.8 (33.0, 40.5) | 1.20 (1.04, 1.38) |
| n | 8659 | 9217 | 9437 | 9136 | |
| New cases | 1164 | 1339 | 1363 | 1518 | |
| PYs | 28,682 | 31,215 | 32,084 | 30,919 | |
Incidence is calculated as new cases per 1000 PYs of follow-up (95% CIs) using Poisson models. Obesity is defined as the first time a person has a body mass index ≥30 kg/m2.Incidence rates are modeled over year and adjusted for sex, race, and age. IRR, incidence rate ratio; PYs, person-years of follow-up. Overall incidence rates are adjusted for sex, race, and age. Sex-specific rates are adjusted for age and race. Age-specific rates are adjusted for race and sex. Race-specific rates are adjusted for sex and age. All incidence rates are shown as adjusted and weighted using survey weights, stratum, and cluster to represent the US population in the 4 periods.