Table 6

Comparison of prevalence data from other studies

First Author

Year

Sample size

Study population

Diagnostic test

Prevalence

Laughlin [10]

2009

n = 4,271

women in the first trimester of pregnancy

transvaginal ultrasonography

10.7% (95%CI: 8.5-13.6%)

Chen [11]

2001

n = 3,174

women aged 17-44 years undergoing tubal sterilization

laparascopy

10.0%*

Borgfeldt [12]

2000

n = 335

asymptomatic women aged 25-40 years

transvaginal ultrasonography

5.4% (95%CI: 3.0-7.8%)

Marino et al. [13]

2004

n = 341

premenopausal women aged 30-60 years

transvaginal ultrasonography

21.4%*

Day Baird [14]

2003

n = 1,364

premenopausal women aged 35-49 years

self-report, medical records, ultrasonography

age 35-39 years: 10-15% in white women; 30-40% in black women*

Downes [31]

2010

n = 4,414

adult female respondends (≥ 18 years)

self-report

from 11.7% (France) to 23.6% (Italy)*

* CI was not indicated

Zimmermann et al. BMC Women's Health 2012 12:6   doi:10.1186/1472-6874-12-6