Table 2.
Trends in mean trunk fat percentage (95% CI) by race or ethnicity among US children aged 8–19 y, NHANES 2011–2012 to 2017–2018.
| Variable | Mean trunk fat percentage (%) | Absolute Increase a | P for trendb | |||
|---|---|---|---|---|---|---|
|
2011–12 (n = 1,828) |
2013–14 (n = 1,996) |
2015–16 (n = 1,907) |
2017–18 (n = 1,508) |
|||
| Overall | 25.6 (24.9–26.3) | 26.1 (25.2–27.0) | 25.9 (25.0–26.9) | 26.2 (25.7–26.7) | 0.6 | 0.18 |
| Age, y | ||||||
| 8–11 | 26.0 (25.0–27.0) | 26.4 (24.8–28.1) | 26.2 (25.2–27.3) | 26.2 (24.7–27.8) | 0.2 | 0.77 |
| 12–19 | 25.4 (24.6–26.3) | 26.0 (24.9–27.2) | 25.8 (24.8–26.8) | 26.2 (25.8–26.5) | 0.8 | 0.12 |
| Gender | ||||||
| Boys | 22.1 (21.3–22.8) | 23.0 (22.3–23.7) | 22.8 (21.6–24.0) | 23.1 (22.4–23.8) | 1.0 | 0.08 |
| Girls | 29.3 (28.4–30.3) | 29.6 (28.3–31.0) | 29.5 (28.5–30.6) | 29.8 (28.8–30.7) | 0.5 | 0.60 |
| RACE/ETHNICITY | ||||||
| Mexican American | ||||||
| All | 27.8 (26.6–29.0) | 28.5 (27.5–29.4) | 30.0 (29.3–30.6) | 29.3 (27.8–30.8) | 1.5 | 0.04 |
| Boys | 24.7 (23.5–25.9) | 25.1 (24.2–26.0) | 27.0 (25.9–28.1) | 26.1 (24.0–28.1) | 1.4 | 0.08 |
| Girls | 31.5 (30.0–33.1) | 32.4 (31.5–33.2) | 33.6 (32.2–35.0) | 33.0 (31.5–34.5) | 1.5 | 0.13 |
| Non-hispanic white | ||||||
| All | 25.2 (24.2–26.3) | 25.6 (24.4–26.8) | 25.1 (23.9–26.4) | 25.0 (23.9–26.2) | −0.2 | 0.81 |
| Boys | 21.5 (20.4–22.7) | 22.9 (21.9–23.9) | 22.2 (20.7–23.7) | 22.2 (20.8–23.5) | 0.7 | 0.70 |
| Girls | 28.9 (27.5–30.3) | 28.7 (26.8–30.6) | 28.5 (27.0–30.0) | 28.3 (26.8–29.8) | −0.6 | 0.54 |
| Non-hispanic black | ||||||
| All | 23.9 (22.8–25.0) | 24.5 (23.3–25.6) | 23.9 (22.5–25.4) | 25.1 (23.5–26.8) | 1.2 | 0.30 |
| Boys | 20.4 (19.5–21.4) | 20.2 (19.3–21.1) | 19.5 (17.5–21.5) | 20.7 (18.4–23.0) | 0.3 | 0.98 |
| Girls | 27.8 (26.1–29.5) | 29.2 (27.4–31.0) | 28.7 (26.5–30.8) | 30.0 (28.9–31.2) | 2.2 | 0.07 |
| Non-hispanic Asian | ||||||
| All | 25.4 (24.2–26.7) | 25.5 (23.8–27.2) | 24.9 (23.5–26.3) | 27.3 (26.3–28.2) | 1.9 | 0.08 |
| Boys | 22.1 (20.4–23.9) | 23.2 (21.0–25.3) | 21.4 (19.4–23.5) | 25.4 (24.1–26.8) | 3.3 | 0.04 |
| Girls | 29.3 (26.9–31.6) | 27.9 (26.5–29.2) | 29.1 (28.0–30.1) | 29.1 (27.7–30.4) | −0.2 | 0.67 |
| Other | ||||||
| All | 26.9 (24.8–29.0) | 27.4 (25.6–29.2) | 27.3 (26.0–28.6) | 27.1 (25.3–29.0) | 0.2 | 0.72 |
| Boys | 23.4 (20.7–26.0) | 23.4 (21.3–25.5) | 24.5 (22.6–26.4) | 23.8 (21.5–26.1) | 0.4 | 0.67 |
| Girls | 30.8 (29.3–32.3) | 31.6 (30.5–32.8) | 30.4 (28.9–31.9) | 30.8 (28.8–32.9) | 0.0 | 0.80 |
a
Absolute increase between NHANES 2011–2012 and NHANES 2017–2018.
b
Time trends in mean trunk fat percentage from 2011–2012 to 2017–2018 were examined with a multiple linear regression model, with adjustment for age, gender, and race or ethnicity, when applicable. Bold values are the statistically significant p-values.