Sensitivity Archives - Revista Brasileira de Ginecologia e Obstetrícia
Summary
Revista Brasileira de Ginecologia e Obstetrícia. 2020;42(1):26-34
To assess the construct and criterion validity of the Postmenopause Sexuality Questionnaire (PMSQ).
The present methodological questionnaire validation study included postmenopausal women. The construct validity was tested by factor analysis and the criterion validity was performed using the correlation between the PMSQ and the Female Sexual Function Index (FSFI). The ROC curve was used to verify sensitivity, specificity and to determine the cutoff point of the PMSQ.
A total of 181 women with amean age of 56.4 ± 5.7 years old were evaluated. The exploratory factor analysis showed that the PMSQ presented Kaiser test = 0.88 and χ2 = 3293.7 (p < 0.001), commonalities ≥ 0.5, and extraction of 9 factors with eigenvalue ≥ 1; explaining 66.3% of the total variance. The PMSQ presented factor loadings between 0.4 and 0.8. A strong correlation between the 2 questionnaires (r = 0.79; p = 0.000) was shown. The cutoff point of the PMSQ was ≤ 55.5, assuming 87.9% sensitivity and 78.9% specificity (p < 0.001).
Since the PMSQ showed a strong correlation with the FSFI questionnaire, it presented good psychometric properties to assess the sexuality in postmenopausal women. Based on these results, the PMSQ could be widely tested as a specific instrument to examine the sexual function in postmenopausal women. Future studies, designed to examine the PMSQ instrument in different populations, are needed.
Summary
Revista Brasileira de Ginecologia e Obstetrícia. 2020;42(1):26-34
To assess the construct and criterion validity of the Postmenopause Sexuality Questionnaire (PMSQ).
The present methodological questionnaire validation study included postmenopausal women. The construct validity was tested by factor analysis and the criterion validity was performed using the correlation between the PMSQ and the Female Sexual Function Index (FSFI). The ROC curve was used to verify sensitivity, specificity and to determine the cutoff point of the PMSQ.
A total of 181 women with amean age of 56.4 ± 5.7 years old were evaluated. The exploratory factor analysis showed that the PMSQ presented Kaiser test = 0.88 and χ2 = 3293.7 (p < 0.001), commonalities ≥ 0.5, and extraction of 9 factors with eigenvalue ≥ 1; explaining 66.3% of the total variance. The PMSQ presented factor loadings between 0.4 and 0.8. A strong correlation between the 2 questionnaires (r = 0.79; p = 0.000) was shown. The cutoff point of the PMSQ was ≤ 55.5, assuming 87.9% sensitivity and 78.9% specificity (p < 0.001).
Since the PMSQ showed a strong correlation with the FSFI questionnaire, it presented good psychometric properties to assess the sexuality in postmenopausal women. Based on these results, the PMSQ could be widely tested as a specific instrument to examine the sexual function in postmenopausal women. Future studies, designed to examine the PMSQ instrument in different populations, are needed.
Summary
Revista Brasileira de Ginecologia e Obstetrícia. 2008;30(9):437-444
DOI 10.1590/S0100-72032008000900003
PURPOSE: to verify the accuracy of uterine cervix cytology for HPV diagnosis, as compared to polymerase chain reaction (PCR) in samples of women with HIV. METHODS: 158 patients who had undergone a first collection of material from the uterine cervix with Ayre's spatula for PCR were included in the study. Then, another collection with Ayre's spatula and brush for oncotic cytology was performed. Only 109 slides were reviewed, as 49 of them had already been destructed for have being filed for over two years. RESULTS: the prevalence of HPV was 11% in the cytological exam and 69.7% in the PCR. Age varied from 20 to 61 years old, median 35 years. The HIV contagious route was heterosexual in 91.8% of the cases, and 79.1% of the patients had had from one to five sexual partners along their lives. The most frequent complaint was pelvic mass (5.1%), and 75.3% of the women had looked for the service for a routine medical appointment. The categorical variable comparison was done through contingency tables, using the χ2 test with Yates's correction to compare the ratios. The Fisher's test was used when one of the expected rates was lower than five. In the comparison of diagnostic tests, sensitivity, specificity and similarity ratios have been calculated. Among the 76 patients with HPV, detected by PCR, only 12 had the diagnosis confirmed by cytology (sensitivity=15.8%), which on the other hand did not present any false-positive results (specificity=100%). Concerning the HPV presence, the cytological prediction for positive results was 100% and 33.3% for negative, when both results were compared. Among the 12 patients with HPV positive cytology, four (33.3%) presented cervical intraepithelial neoplasia (OR=56; positive similarity ratio=positive infinity; negative similarity ratio=0.83). CONCLUSIONS: As the cytology specificity is quite high, it is possible to rely on the positive result, which means that a positive result will surely indicate the presence of HPV. The low sensitivity of cytology does not qualify it as a survey exam for HPV detection in this female group.
Summary
Revista Brasileira de Ginecologia e Obstetrícia. 2008;30(9):437-444
DOI 10.1590/S0100-72032008000900003
PURPOSE: to verify the accuracy of uterine cervix cytology for HPV diagnosis, as compared to polymerase chain reaction (PCR) in samples of women with HIV. METHODS: 158 patients who had undergone a first collection of material from the uterine cervix with Ayre's spatula for PCR were included in the study. Then, another collection with Ayre's spatula and brush for oncotic cytology was performed. Only 109 slides were reviewed, as 49 of them had already been destructed for have being filed for over two years. RESULTS: the prevalence of HPV was 11% in the cytological exam and 69.7% in the PCR. Age varied from 20 to 61 years old, median 35 years. The HIV contagious route was heterosexual in 91.8% of the cases, and 79.1% of the patients had had from one to five sexual partners along their lives. The most frequent complaint was pelvic mass (5.1%), and 75.3% of the women had looked for the service for a routine medical appointment. The categorical variable comparison was done through contingency tables, using the χ2 test with Yates's correction to compare the ratios. The Fisher's test was used when one of the expected rates was lower than five. In the comparison of diagnostic tests, sensitivity, specificity and similarity ratios have been calculated. Among the 76 patients with HPV, detected by PCR, only 12 had the diagnosis confirmed by cytology (sensitivity=15.8%), which on the other hand did not present any false-positive results (specificity=100%). Concerning the HPV presence, the cytological prediction for positive results was 100% and 33.3% for negative, when both results were compared. Among the 12 patients with HPV positive cytology, four (33.3%) presented cervical intraepithelial neoplasia (OR=56; positive similarity ratio=positive infinity; negative similarity ratio=0.83). CONCLUSIONS: As the cytology specificity is quite high, it is possible to rely on the positive result, which means that a positive result will surely indicate the presence of HPV. The low sensitivity of cytology does not qualify it as a survey exam for HPV detection in this female group.
Summary
Revista Brasileira de Ginecologia e Obstetrícia. 2006;28(11):633-642
DOI 10.1590/S0100-72032006001100002
PURPOSE: to verify the sensitivity, specificity and accuracy of some ultrasonographic measurements in the diagnosis of stress urinary incontinence (SUI). METHODS: transvaginal ultrasound measurements of the bladder neck descent, urethral mobility and urethrovesical funneling caused by urination effort were performed in 40 women with SUI and in 40 women from a control group. Age, parity and the number of pregnancies were different in both groups. Several cut points were performed to evaluate the sensitivity, specificity and accuracy of these measurements as a diagnostic tool for SUI. The urodynamic results were used as gold standard. Univariated analysis was done using Yates chi2 Test and Pearson chi2 Test. RESULTS: in the best cut point for bladder neck descent measurements, sensitivity was 40%, specificity was 72% and accuracy was 57%; in the best cut point for urethral mobility measurements, sensitivity was 40%, specificity was 70% and accuracy was 55%; in the best cut point for urethrovesical funneling measurements, sensitivity was 58%, specificity was 48% and accuracy was 52%; in the best cut point for the addition of the differences of these three measurements, sensitivity was 32%, specificity was 62% and accuracy was 48%. CONCLUSION: vaginal ultrasonography was not a valid diagnostic method for stress urinary incontinence in the present study.
Summary
Revista Brasileira de Ginecologia e Obstetrícia. 2006;28(11):633-642
DOI 10.1590/S0100-72032006001100002
PURPOSE: to verify the sensitivity, specificity and accuracy of some ultrasonographic measurements in the diagnosis of stress urinary incontinence (SUI). METHODS: transvaginal ultrasound measurements of the bladder neck descent, urethral mobility and urethrovesical funneling caused by urination effort were performed in 40 women with SUI and in 40 women from a control group. Age, parity and the number of pregnancies were different in both groups. Several cut points were performed to evaluate the sensitivity, specificity and accuracy of these measurements as a diagnostic tool for SUI. The urodynamic results were used as gold standard. Univariated analysis was done using Yates chi2 Test and Pearson chi2 Test. RESULTS: in the best cut point for bladder neck descent measurements, sensitivity was 40%, specificity was 72% and accuracy was 57%; in the best cut point for urethral mobility measurements, sensitivity was 40%, specificity was 70% and accuracy was 55%; in the best cut point for urethrovesical funneling measurements, sensitivity was 58%, specificity was 48% and accuracy was 52%; in the best cut point for the addition of the differences of these three measurements, sensitivity was 32%, specificity was 62% and accuracy was 48%. CONCLUSION: vaginal ultrasonography was not a valid diagnostic method for stress urinary incontinence in the present study.
