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The Scientific World Journal
Volume 2012 (2012), Article ID 620519, 5 pages
http://dx.doi.org/10.1100/2012/620519
Research Article

Quality of Life in Menopausal Women: A Brazilian Portuguese Version of the Cervantes Scale

1Post-Graduate Program in Medicine, Universidade Federal do Rio Grande do Sul, 90040-060 Porto Alegre, Brazil
2Faculdade de Medicina, Universidade de Passo Fundo, 99052-900 Passo Fundo, Brazil
3Menopause Division, Instituto Palacios, 28009 Madrid, Spain
4Obstetrics and Gynecology Department, Universidade Federal do Rio Grande do Sul; Hospital de Clínicas de Porto Alegre, 90035-903 Porto Alegre, Brazil

Received 8 November 2011; Accepted 29 November 2011

Academic Editors: A. Brzezinski, L. M. Chiechi, and D. V. Espino

Copyright © 2012 José E. M. Lima et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

We present the translation, cultural adaptation and validation of the Cervantes Scale to Brazilian Portuguese. The Cervantes Scale (CS) was originally described in Spanish, and is a tool to measure health-related quality of life in perimenopausal and menopausal women. A cross-sectional study was carried out with 180 women aged 45 to 64 years. In addition to the CS, the following questionnaires were applied: Women's Health Questionnaire (WHQ) and abbreviated version of the World Health Organization’s Quality of Life Questionnaire (Abbreviated WHOQOL-bref). In conclusion, the Brazilian Portuguese version of the CS is easy to apply and understand. The evaluation of its psychometric properties was satisfactory, and it can be applied to assess health-related QoL in Brazilian perimenopausal and menopausal women.

1. Background

Climacteric symptoms are known to impair quality of life (QoL) [1]. The climacteric syndrome is associated with menstrual irregularities, hot flashes, sweating, palpitations, sleep disturbance, irritability, lethargy, depressed mood, forgetfulness, decreased libido, vulvovaginal dryness, dyspareunia, and urinary symptoms [2]. In addition, during this period, gradual changes occur in bone metabolism, resulting in increased risk for osteoporotic fractures. The incidence of cardiovascular disease also increases significantly after menopause [1, 3].

Over the last two decades, the importance of QoL as a health parameter has grown consistently, and a range of scales has been proposed to evaluate specific population groups [46]. Among them, the Cervantes Scale (CS) was developed and validated in a representative sample of Spanish pre-, peri-, and menopausal women [7, 8]. This self-administered questionnaire evaluates four domains: health and menopause, sexuality, couple relationship, and psychological aspects.

The purpose of this study was the translation, cultural adaptation, and validation of the CS in Brazilian Portuguese.

2. Methods

This study was conducted in two stages. The first stage included the translation and cultural adaptation of the scale [9], including a pilot study that assessed the degree of understanding of the Brazilian Portuguese version of the Cervantes Scale (BP/CS) by the target population. In the second stage, the BP/CS was validated through statistical analysis of its psychometric properties: internal consistency, intraobserver reliability (test-retest with a two- to four-week interval between applications in women without any major changes in their health status), and validity, based on the comparison of the CS with the Women’s Health Questionnaire (WHQ) [4] and the World Health Organization’s Quality of Life Questionnaire (WHOQoL-bref) [10], which had been previously validated for BP. A question was added at the end of the BP/CS (“Were there any words that you did not understand?”) to detect opportunities of improvement. The translation followed World Health Organization (WHO) recommendations [9]. Cultural equivalence was established if all the questions were understood by at least 85% of the subjects [11].

Statistical analysis was performed using SPSS 15.0 for Windows. Continuous variables were expressed as mean ± standard deviation and categorical variables were expressed as absolute and relative frequency. Internal consistency was assessed using Cronbach’s coefficient. Reliability was assessed using the intraclass correlation coefficient. Correlations between the global BP/CS score, BP/CS domain scores, and BP/CS subdomain scores with the WHQ and the WHOQoL-bref were evaluated using Pearson’s correlation coefficient. The associations between global BP/SC, domain, and subdomain scores with sociodemographic, clinical, and behavioral variables were assessed using Student’s t test and analysis of variance (ANOVA).

Between August 2007 and November 2008, women were consecutively selected for this cross-sectional study from three university clinics and one private clinic in the same city, in southern Brazil. The sample size was calculated as 179 participants using the WinPepi software for an intraclass correlation coefficient of at least 0.7, with precision of 0.15 and significance of 5%. The study was approved by the University’s Research Ethics Committee (protocol 002/2007), and all participants signed an informed consent form. A form was initially filled for collection of sociodemographic, clinical, and behavioral data. Then, the questionnaires were applied in the following order: BP/CS, WHQ, and WHOQoL-bref.

Menopause was defined as absence of spontaneous menstrual periods in the past 12 months in women not submitted to bilateral oophorectomy or hysterectomy, who were older than 50 years at the time of the survey. Exclusion criteria were illiteracy or significant visual disability that prevented reading of the questionnaire, life-threatening diseases or clinical instability, and use of antidepressants.

The questionnaires were considered as invalid if three (10% of scale) or more questions were left unanswered. In the presence of one or two unanswered questions, the total score or the score of the area was obtained by multiplying the result by a correction factor [12]. Data were entered into an Excel spreadsheet and revised for missing or duplicated information.

3. Results

3.1. Translation and Cultural Adaptation

Ten climacteric women (patients from the university clinic and from the private clinic) participated in the pilot study. There were no difficulties with the BP/SC. An expert committee comprising three gynecologists, one psychiatrist, and one general practitioner was also satisfied with the BP/CS.

3.2. Sociodemographic, Clinical, Behavioral Features

Table 1 describes the sociodemographic characteristics of 180 women included in the study: 123 (68.3%) from the university outpatient clinic and 57 (31.7%) from the private clinic. Age ranged from 45 to 64 years. One hundred and eleven (61.7%) women had never received hormone therapy (HT), 23 (13.3%) had started and discontinued HT, and 46 (25.6%; 47.4% of the postmenopausal group) were on HT. Natural menopause was observed in 47 (26.1%) women. Mean age at spontaneous menopause was 4 8 . 1 ± 4 . 1 years; 40 (22.2%) women had surgical menopause (hysterectomy). Considering the cutoff point of age 50 years, 13 (7.2%) women were younger and 27 (15.0%) were older than 50 years. Twenty three (12.8%) were not able to report when menopause occurred, and 70 (38.9%) had not yet experienced menopause. Climacteric symptoms were observed in 153 (85.0%) women.

tab1
Table 1: Demographic characteristics of brazilian women participating in the validation of the brazilian portuguese version of the cervantes scale ( 𝑛 = 1 8 0 ).

4. Evaluation of Psychometric Proprieties

Cronbach’s alpha for the global CS score was 0.83. For each domain, Cronbach’s alpha was 0.81 for menopause and health, 0.84 for the psychological domain, 0.79 for sexuality, and 0.73 for couple relationship. Concerning subdomains, Cronbach’s alpha was 0.85 for vasomotor symptoms, 0.62 for health, and 0.54 for aging. Table 2 shows the correlations between global CS score and domain and subdomain scores.

tab2
Table 2: Correlation between the domains and subdomains of the brazilian portuguese version of the cervantes scale.

We evaluated intraobserver reliability by retesting 66 (36.6%) women. The intraclass correlation coefficient for the global scale was 𝑟 = 0 . 9 4 , 95% CI: 0.89–0.96 ( 𝑃 < 0 . 0 0 1 ). The correlation for the different domains was menopause and health, 𝑟 = 0 . 9 2 , psychological, 𝑟 = 0 . 8 8 , sexuality, 𝑟 = 0 . 8 8 , and couple relationship, 𝑟 = 0 . 8 9 . For the three subdomains, the correlation coefficients were vasomotor symptoms, 𝑟 = 0 . 9 0 , health, 𝑟 = 0 . 9 2 , and aging, 𝑟 = 0 . 9 0 ( 𝑃 < 0 . 0 0 1 ).

Pearson’s correlation coefficient for the comparison between the BP/CS and the WHQ and WHOQoL-bref was 𝑟 = 0 . 7 9 and 𝑟 = 0 . 7 1 , respectively ( 𝑃 < 0 . 0 0 1 ). Table 3 shows the correlation between BP/CS scales and subscales with the WHQ and the WHOQoL-bref. Discriminant validity was observed for schooling, family income, presence or absence of vasomotor symptoms, and frequency of physical activity.

tab3
Table 3: Correlation between the domains and subdomains of the brazilian portuguese versions of the cervantes scale, women’s health questionnaire and the WHOQOL-bref.

Tables 4 and 5 show the comparison of BP/CS scores in patients with different levels of schooling and income, presence/absence of hot flushes, and different levels of physical activity, respectively. No discriminant validity was observed for the age subgroups (45 to 54 years and 55 to 64 years) and climacteric period (premenopausal and menopausal women with and without hormone therapy).

tab4
Table 4: Mean cervantes scale scores in brazilian women according to schooling.
tab5
Table 5: Mean cervantes scale scores in brazilian women with or without hot flashes.

5. Discussion

In the present study, the CS was translated into Brazilian Portuguese and culturally validated. The time required for completion of the BP/SC was 6 to 8 minutes, which is equivalent to that reported for the original Spanish version [7]. The internal consistency observed for the BP/CS was also similar of that of the original CS (>0.7).

Criterion validity was assessed via the correlation of the BP/CS in BP with the WHQ and the WHOQoL-bref. A stronger correlation was observed with the WHQ. This was expected because the WHQ was also developed for this specific population, whereas the WHOQoL-bref is a generic instrument; the inclusion of the WHOQoL-bref sought to identify general changes in the QoL not specifically related to the climacteric syndrome.

When evaluating the discriminant validity of the BP/CS, we observed significantly different scores between groups with different levels of schooling and family income, presence or absence of vasomotor symptoms (hot flushes), and frequency of physical activity. Concerning schooling, we observed that higher schooling was associated with more QoL. Similarly, we observed that higher family income was also associated with better QoL, with no differences in the vasomotor symptoms subdomain.

In our study, the presence of vasomotor symptoms and lack of physical activity were associated with low QoL. This association was not observed in the sexuality and couple relationship domains.

Comparing age (45–54 years and 55–64 years) or climacteric period (premenopausal and menopausal women with and without HT use) subgroups did not reveal statistically significant differences in the global score and in most areas of the BP/CS, indicating a similar level of QoL. This finding might be explained by the inclusion of women seeking medical care in the presence of symptoms or women already receiving treatment. It is likely that discriminant validity would be reached for these variables using the BP/CS in a population-based survey with random sampling.

6. Conclusions

We observed that most questionnaires with 3 or more unanswered items (i.e., invalid) were filled by women without a partner and/or not sexually active. This warrants adjustments in the CS to contemplate this population and ensure that all climacteric women, irrespective of their marital status and sexual activity, can be evaluated.

One limitation of this study was the use of a convenience sample. Thus, the present results cannot be extrapolated for the general population. However, because the Brazilian Portuguese version of the Cervantes Scale was easy to apply and understand, with good psychometric properties (internal consistency, reliability, and validity), we believe this version can be used to assess QoL in climacteric women in Brazil.

Competing Interests

The authors declare that they have no conflict of interests.

Authors’ Contributions

All contributors listed as authors have participated substantially in the concept and design of the study: J. E. M. Lima participated in the collection, analysis, and interpretation of data and drafted the manuscript. M. C. U. Wender designed the study, coordinated the collection, analysis, and interpretation of data, and critically revised the manuscript. S. Palacios is one of the authors who designed the original version of the Cervantes Scale. He participated in the design of this study, critically revised the manuscript, and drafted the final version of the manuscript. All authors have read and approved the final version of the manuscript, are qualified for authorship, believe the submission represents honest work, and take full responsibility for the reported findings.

References

  1. J. Rymer and E. P. Morris, “Extracts from "clinical evidence": menopausal symptoms,” British Medical Journal, vol. 321, no. 7275, pp. 1516–1519, 2000. View at Google Scholar · View at Scopus
  2. D. Grady, “Clinical practice. Management of menopausal symptoms,” New England Journal of Medicine, vol. 355, no. 22, pp. 2338–2347, 2006. View at Publisher · View at Google Scholar · View at PubMed · View at Scopus
  3. J. F. Randolph Jr., M. Sowers, I. Bondarenko et al., “The relationship of longitudinal change in reproductive hormones and vasomotor symptoms during the menopausal transition,” Journal of Clinical Endocrinology and Metabolism, vol. 90, no. 11, pp. 6106–6112, 2005. View at Publisher · View at Google Scholar · View at PubMed · View at Scopus
  4. C. R. da Silva Filho, E. C. Baracat, L. O. Conterno, M. A. Haidar, and M. B. Ferraz, “Climacteric symptoms and quality of life: validity of women's health questionnaire,” Revista de Saúde Pública, vol. 39, no. 3, pp. 333–339, 2005. View at Google Scholar · View at Scopus
  5. W. H. Utian, J. W. Janata, S. A. Kingsberg, M. Schluchter, and J. C. Hamilton, “The Utian Quality of Life (UQOL) Scale: development and validation of an instrument to quantify quality of life through and beyond menopause,” Menopause, vol. 9, no. 6, pp. 402–410, 2002. View at Publisher · View at Google Scholar · View at Scopus
  6. R. M. Ciconelli, M. B. Ferraz, W. Santos, I. Meinão, and M. R. Quaresma, “Brazilian-Portuguese version of the SF-36. A reliable and valid quality of life outcome measure,” Revista Brasileira de Reumatologia, vol. 39, no. 3, pp. 143–150, 1999. View at Google Scholar · View at Scopus
  7. S. Palacios, J. Ferrer, J. Parrilla, C. Castelo-Branco, and M. Manubens, “Design of a new specific quality of life scale for menopause in Spanish language, The Cervantes Scale,” Climateric, vol. 5, supplement 1, p. 159, 2002. View at Google Scholar
  8. C. Castelo-Branco, S. Palacios, J. Ferrer-Barriendos et al., “Understanding how personality factors may influence quality of life: development and validation of the Cervantes Personality Scale,” Menopause, vol. 15, no. 5, pp. 914–918, 2008. View at Publisher · View at Google Scholar · View at PubMed · View at Scopus
  9. M. P. A. Fleck, O. F. Leal, S. Louzada et al., “Development of the Portuguese version of the OMS evaluation instrument of quality of life,” Revista Brasileira de Psiquiatria, vol. 21, no. 1, pp. 19–28, 1999. View at Google Scholar
  10. M. Hunter, “The women's health questionnaire: a measure of mid-aged women's perceptions of their emotional and physical health,” Psychology & Health, vol. 7, pp. 45–54, 1992. View at Google Scholar
  11. F. Guillemin, C. Bombardier, and D. Beaton, “Cross-cultural adaptation of health-related quality of life measures: literature review and proposed guidelines,” Journal of Clinical Epidemiology, vol. 46, no. 12, pp. 1417–1432, 1993. View at Publisher · View at Google Scholar · View at Scopus
  12. S. Palacios, J. Ferrer-Barriendos, J. J. Parrilla et al., “Calidad de vida relacionada con la salud en la mujer española durante la perimenopausia y posmenopausia. Desarrollo y validación de la Escala Cervantes,” Medicina Clínica, vol. 122, no. 6, pp. 205–211, 2004. View at Publisher · View at Google Scholar · View at Scopus