Fig 1.
Measurements of the DCSA using MRI.
Sagittal (left) and axial (right) view of the L1/2 disc level of a participant. The DCSA is surrounded by a white dotted line using axial MRI at each disc level (straight white line).
Table 1.
Demographic data between the OAB+ group and OAB- group.
Table 2.
Disc level of the mDCSA.
Table 3.
Results of the single logistic analysis of the factors that correlated with the prevalence of OAB.
Table 4.
Results of stepwise multiple logistic regression analyses relative to OAB.
Fig 2.
OABSS and total score of each question.
Daytime frequency, Q1; night-time frequency, Q2; urgency, Q3; urgency incontinence, Q4. The bars represent the groups: mDCSA<70 mm2, 70 mm2≤mDCSA<110 mm2, 110 mm2≤mDCSA<150 mm2, and 150 mm2≤mDCSA, from left to right. * indicates a significant between-group difference (P<0.05); NS indicates no significant difference.
Fig 3.
Box plot of OAB, age, and mDCSA.
Box plot of OAB/ age (A), OAB/ mDCSA (B), age/ mDCSA. Each number above the box plot represents the result of Spearman’s rank correlation (r: correlation coefficient, P: statistical significance).
Fig 4.
The solid black line represents the ROC curve for OAB to define the cutoff mDCSA. The dotted line represents the diagonal reference line. The cutoff mDCSA, calculated from this curve, was 69 mm2 (sensitivity: 86.7%; specificity: 40.0%). The large black dot indicates the point at which the cutoff was calculated.
Table 5.
Scoring system based on significant independent factors of multiple logistic regression analyses.
Fig 5.
Cutoff value of the scoring system.
The solid black line represents the ROC curve for OAB to define the cutoff value of the scoring system. The dotted line represents the diagonal reference line. The cutoff value of the scoring system, calculated from this curve, was 7.5 points (sensitivity: 70.0%; specificity: 72.1%). The large black dot indicates the point at which the cutoff value was calculated.