Table 1. Population mean and median (50th percentile) values with selected percentiles of the sagittal abdominal diameter in US adults, from NHANES 2011–2012.
| Population Percentiles, cm | ||||||||
| Sex | Age, y | Sample N | Mean (95% CI), cm | 5th | 25th | 50th (95% CI) | 75th | 95th |
| Both | ≥20 | 4817 | 22.5 (22.2−22.8) | 16.4 | 19.2 | 21.9 (21.6−22.4) | 25.2 | 30.5 |
| 20–34 | 1292 | 21.0 (20.6−21.5) | 15.9 | 17.8 | 20.1 (19.7−20.8) | 23.4 | 29.1 | |
| 35–49 | 1240 | 22.5 (22.0−23.0) | 16.4 | 19.4 | 21.9 (21.3−22.5) | 25.0 | 30.8 | |
| 50–64 | 1311 | 23.5 (23.0−24.0) | 17.3 | 20.3 | 23.1 (22.4−23.7) | 26.1 | 31.9 | |
| ≥65 | 974 | 23.4 (22.9−23.8)* | 17.5 | 20.5 | 23.2 (22.6–23.5) | 25.9 | 30.4 | |
| Men | ≥20 | 2450 | 23.2 (22.8–23.6) | 17.3 | 20.1 | 22.7 (22.2–23.2) | 25.8 | 31.2 |
| 20–34 | 696 | 21.5 (20.9–22.0) | 16.3 | 18.3 | 20.8 (19.9–21.4) | 23.7 | 29.1 | |
| 35–49 | 610 | 23.3 (22.9–23.7) | 17.9 | 20.4 | 22.8 (22.3–23.4) | 25.3 | 31.1 | |
| 50–64 | 638 | 24.4 (23.8–24.9) | 17.9 | 21.3 | 23.7 (23.2–24.6) | 26.9 | 32.4 | |
| ≥65 | 506 | 24.3 (23.7–24.9)* | 18.6 | 21.7 | 23.8 (23.4–24.5) | 26.7 | 31.6 | |
| Women | ≥20 | 2367 | 21.8 (21.5–22.1)† | 15.9 | 18.5 | 21.1 (20.8–21.5) | 24.7 | 30.0 |
| 20–34 | 596 | 20.6 (20.1–21.0)‡ | 15.3 | 17.1 | 19.6 (18.8–20.0) | 22.8 | 29.1 | |
| 35–49 | 630 | 21.6 (21.0–22.2)† | 15.7 | 18.2 | 20.8 (20.2–21.8) | 24.4 | 30.2 | |
| 50–64 | 673 | 22.7 (22.1–23.3)† | 16.9 | 19.4 | 21.8 (21.2–23.5) | 25.3 | 30.6 | |
| ≥65 | 468 | 22.5 (21.9–23.2)* † | 16.9 | 19.3 | 22.3 (21.3–23.2) | 25.4 | 29.2 | |
* p<0.001 for age trend.
†
p<0.001 compared to men.
‡
p<0.01 compared to men.