Relationship between sacral ratio and primary enuresis in 5-9 year-old children

Developmental anomalies in sacral bone have been recognized as one of the causes of urinary incontinence. Sacral ration was suggested as a valuable scale in determining the sacral bone health. According to insufficient studies in this field and variation in results, a determination of relationship between sacral ratio (SR) with primary enuresis were seemed imperative. In a cross sectional-analytic study, two groups (n=59) of 5-9 year-old children who admitted in pediatric and urology clinics of Amir Kabir hospital in one year were determined. Primary enuresis group with normal urine-analysis and ultrasonography, no history of dysuria, frequency, and urgency and control group without primary enuresis were selected. The mean ratio between the greatest widths of the sacral bone to its greatest length in the AP radiogram was compared between both groups. In case group, 98.3% had normal SR. The mean ratio of greatest width to length was 0.89. There were not a significant relationship between gender and normal or abnormal SR. In control group, 88.1% had normal SR. The mean ratio of greatest width to length was 0.91. Girls more than boys had normal SR. Significant difference between mean ratio of SR and greatest width to length in both groups were not seen. Significant relationship between SR with primary enuresis in 5-9 year-old children was not seen.