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. Author manuscript; available in PMC: 2013 Sep 2.
Published in final edited form as: Neurourol Urodyn. 2011 Feb 22;30(4):541–546. doi: 10.1002/nau.20934

Table 5.

Conversion formula from short form score to long form score of PFDI and PFIQ at baseline

Scale Subscale N# Conversion formula#
(long form = slope*short form + intercept)		 R2
Development Sample## 		R2
Validation Sample## 		R2
Total Population
PFDI UDI 1001 UDI score = 1.9 * UDI-6 score + 11 0.77 0.78 0.78
POPDI 1000 POPDI score = 2.6 * POPDI-6 score + 13 0.78 0.83 0.8
CRADI 984 CRADI score = 3.2 * CRADI-8 score + 10 0.86 0.85 0.86
PFIQ UIQ 995 UIQ score = 3.3 * UIQ-7 score 0.92 0.93 0.92
POPIQ 994 POPIQ score = 3.3 * POPIQ-7 score 0.95 0.96 0.96
CRAIQ 997 CRAIQ score = 3.5 * CRAIQ-7 score 0.96 0.97 0.96
#

N, slope and intercept in conversion formula, and p-value are from pooled sample across 4 multi-center studies

#

Based on linear regression models, only statistically significant (p < 0.0001) slope and intercept are kept in the formulas

##

Sample sizes for Development and Validation Samples are ½ of total N for each row