From: Clinical application of a fixed reference line in the ultrasound quantitative diagnosis of female pelvic organ prolapse
Measurement site
Correlation coefficient
p
95% confidence interval
PFUS
POP-Q
Lower limit
Upper limit
PBN
Aa
0.922
0.000
0.889
0.945
PBB
Ba
0.923
0.891
0.947
PC
C
0.925
0.893
PRA
Bp
0.444
0.283
0.581