Table 1.
Discriminant Validity of the Genitourinary Pain Index (GUPI)
| Men (n=1653) | Women (n=1403) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| GUPI Score | IC n=14 | Prostatitis n=593 | Other Symptoms n=244 | Controls n=552 | p-valuea | IC n=82 | Incontinence n=427 | Other Symptoms n=268 | Controls n=876 | p-valuea |
| Total | ||||||||||
| Mean | 16.3 | 8.9 | 11.2 | 4.5 | <0.0001c | 20.7 | 11.6 | 11.1 | 5.9 | <0.0001b |
| s.d. | 12.8 | 7.1 | 8.4 | 4.8 | 9.5 | 6.9 | 8.5 | 5.2 | ||
| Median | 15 | 8 | 9 | 3 | 24 | 11 | 9 | 5 | ||
| Pain | ||||||||||
| Mean | 5.6 | 3.3 | 3.7 | 1.4 | <0.0001c | 7.4 | 3.4 | 3.9 | 1.8 | <0.0001b |
| s.d. | 7.4 | 3.8 | 4.4 | 2.2 | 5.1 | 3.4 | 4.0 | 2.4 | ||
| Median | 2.5 | 2 | 2 | 0 | 8 | 2 | 2 | 1 | ||
| Urinary | ||||||||||
| Mean | 4.6 | 2.6 | 3.5 | 1.4 | <0.0001c | 5.8 | 3.5 | 3.0 | 1.7 | <0.0001b |
| s.d. | 2.8 | 2.4 | 2.7 | 1.8 | 2.8 | 2.7 | 2.6 | 1.9 | ||
| Median | 6 | 2 | 3 | 1 | 6 | 3 | 2 | 1 | ||
| QOL | ||||||||||
| Mean | 6.2 | 3.3 | 4.5 | 1.7 | <0.0001c | 7.2 | 5.1 | 4.4 | 2.4 | <0.0001b |
| s.d. | 4.0 | 2.6 | 3.0 | 2.1 | 3.1 | 3.0 | 3.3 | 2.4 | ||
| Median | 6 | 3 | 4 | 1 | 8 | 5 | 4 | 2 | ||
ANOVA indicates that the four patient groups differ for total GUPI score as well as subscales in males and females. After adjustment for multiple comparisons, mean GUPI scores (total score and subscales) were significantly lower in Controls than in any of the other groups.
In women, mean total scores for the GUPI as well as all subscales were significantly greater in the IC group than in the Other Symptoms group and the Incontinence groups. Mean total and subscale scores were not significantly different between the Other Symptoms group and Incontinence group.
In men, mean scores in the IC group and in the Other Symptoms group were significantly greater than those in the Prostatitis group for total GUPI scores and all subscales except the pain subscale. Mean total and subscale scores were not significantly different between the IC group and the Other Symptoms group.