Uterine Roundness Index: Model Formulation and Nomogram for a Nigerian Population

ABSTRACT

This study was aimed to establish a nomogram for uterine roundness index (UTRI) for a Nigerian population. Seven hundred Nigerian girls and women in the premenarche; nulliparous; multiparous and postmenopausal groups with normal uteri were evaluated by pelvic ultrasound. The length; anteroposterior and transverse diameters of the uterus were measured and the UTRI calculated as the ratio of anteroposterior diameter to the length. The age; height; and parity of the subject were recorded. The mean UTRI +SD were 0.44457+0.0629 for premenarche; 0.5880+0.1118 for nulliparous; 0.6005+0.1046 for multiparous and 0.5269+0.1037 for postmenopausal. Pearson's correlation analysis showed significant correlation between UTRI and age; height and weight in premenarche group and weight in the nulliparous; multiparous and postmenopausal groups (p 0.05). Significant negative correlation between UTRI and age occurred only in the postmenopausal group (p 0.05). The study has established a nomogram for UTRI in a Nigeria population which will be of gynaecological importance to sonographers and referring clinicians in assessing the normality of uterine shapes and contour