Table 1 Baseline characteristics of study participants
Characteristic | United States study participants (n = 60) | Field study participants (n = 20) | P value |
|---|---|---|---|
Agea (years) | 36 (28.5–38) | 31 (24–53.5) | 0.56c |
BMI > 30 | 23/60 (38%) | 0/20 (0%) | < 0.01 |
Paritya | 1 (0–2) | 2 (0.5–5.5) | 0.13c |
Race | < 0.01 | ||
Caucasian | 40/60 (67%) | 0 (0%) | |
Black | 17/60 (28%) | 20/20 (100%) | |
Other | 3/60 (5%) | 0 (0%) | |
Ethnic origin | 0.23d | ||
Hispanic | 5/60 (8%) | 0/20 (0%) | |
Non-Hispanic | 55/60 (92%) | 20/20 (100%) | |
Menopausal status | 0.64d | ||
Pre-menopausal | 48/60 (80%) | 16/20 (80%) | |
Post-menopausal | 12/60 (20%) | 4/20 (20%) | |
Day of menstrual cycleb | 20 ± 12 | Unknown | n/a |
Indication for USN | < 0.01 | ||
Pelvic Pain | 10/60 (17%) | 20/20 (100%) | |
Abnormal uterine bleeding | 17/60 (28%) | 0/20 (0%) | |
IUD localization | 8/60 (13%) | 0/20 (0%) | |
Ovarian cyst | 16/60 (27%) | 0/20 (0%) | |
Follow up of known pathology | 9/60 (15%) | 0/20 (0%) |