Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Cumulative incidence of back pain stratified by age, sex and site of pain
| Cumulative incidence (%) | 95% CI | |
| All participants | 8.93 | 8.62 to 9.25 |
| Sex | ||
| Female | 10.31 | 9.82 to 10.80 |
| Male | 7.62 | 7.20 to 8.03 |
| BMIz categories | ||
| Underweight | 4.08 | 1.20 to 6.95 |
| Normal weight | 8.78 | 8.45 to 9.12 |
| Overweight | 10.14 | 8.89 to 11.39 |
| Obese | 11.83 | 9.43 to 14.24 |
| Site of pain | ||
| Cervical | 2.86 | 2.71 to 3.01 |
| Thoracic | 2.46 | 2.29 to 2.63 |
| Lumbar | 4.33 | 4.08 to 4.58 |
BMIz, body mass index for age z-score.
