Medline ® Abstracts for References 6-17

OBJECTIVE: Our purpose was to compare pelvic organ support in nulliparous pregnant and nonpregnant women at a single institution.

STUDY DESIGN: This was a case-control study. Pregnant patients and nonpregnant control subjects were matched according to age and race. Subjects underwent pelvic organ support evaluation by use of the pelvic organ prolapse quantification (POPQ) examination as part of routine prenatal or gynecologic care. The Pearson chi(2) statistic was used for statistical analysis, with a P value of 5% set for significance.

RESULTS: A total of 21 pregnant and 21 nonpregnant nulliparous women between the ages of 18 and 29 years were included. All patients in the nonpregnant group had a POPQ stage of 0 or 1, whereas 47.6% of the pregnant subjects had POPQ stage 2 (P<.001). Individual components of the POPQ examination were compared. Significant differences were noted for points Aa and Ba, Ap and Bp, and PB and TVL.

CONCLUSIONS: In nulliparous women, pregnancy is associated with increased POPQ stage compared with nonpregnant control subjects.

OBJECTIVE: The purpose of this study was to describe the prevalence of and correlates for pelvic organ prolapse.

STUDY DESIGN: This was a cross-sectional analysis of women who enrolled in the Women's Health Initiative Hormone Replacement Therapy Clinical Trial (n = 27,342 women). Baseline questionnaires ascertained demographics and personal habits. A baseline pelvic examination assessed uterine prolapse, cystocele, and rectocele. Descriptive statistics and logistic regression models were used to investigate factors that were associated with pelvic organ prolapse.

RESULTS: In the 16,616 women with a uterus, the rate of uterine prolapse was 14.2%; the rate of cystocele was 34.3%; and the rate of rectocele was 18.6%. For the 10,727 women who had undergone hysterectomy, the prevalence of cystocele was 32.9% and of rectocele was 18.3%. After controlling for age, body mass index, and other health/physical variables, African American women demonstrated the lowest risk for prolapse. Hispanic women had the highest risk for uterine prolapse. Parity and obesity were strongly associated with increased risk for uterine prolapse, cystocele, and rectocele.

CONCLUSION: Pelvic organ prolapse is a common condition in older women. The risk for prolapse differs between ethnic groups, which suggests that the approaches to risk-factor modification and prevention may also differ. These data will help address the gynecologic needs of diverse populations.

OBJECTIVE: The purpose of this study was to describe the natural history of pelvic organ prolapse after menopause.

STUDY DESIGN: Over 2 to 8 years, participants in the estrogen plus progestin trial of the Women's Health Initiative at the University of California Davis had annual pelvic examinations, with an assessment of uterine prolapse, cystocele, and rectocele. The findings from these examinations were used to describe the incidence of pelvic organ prolapse, the probability of progression or regression, and the associated risk factors.

RESULTS: At baseline, 31.8% of women had pelvic organ prolapse (n=412 women). The annual incidences of cystocele, rectocele, and uterine prolapse were 9.3, 5.7, and 1.5 cases per 100 women-years, respectively. Incident prolapse was associated with increasing parity and waist circumference. The progression rates for grade 1 pelvic organ prolapse (per 100 women-years) were 9.5 for cystocele, 13.5 for rectocele, and 1.9 for uterine prolapse. The annual rates of regression (per 100 women-years) was 23.5, 22, and 48, respectively.

CONCLUSION: Our data suggest that pelvic organ prolapse is not always chronic and progressive as traditionally thought. Spontaneous regression is common, especially for grade 1 prolapse.

OBJECTIVE: To investigate the association between parity and urinary incontinence, including subtypes and severity of incontinence, in an unselected sample, with special emphasis on age as a confounder or effect modifier.

METHODS: This was a cross-sectional study (response rate 80%) with 27,900 participating women. Data on parity and urinary leakage, type, frequency, amount, and impact of incontinence were recorded by means of a questionnaire. A validated severity index was used. Relative risks (RR) with nulliparous women as reference were used as an effect measure.

RESULTS: Incontinence was reported by 25% of participants. Prevalences among nulliparous women ranged from 8% to 32%, increasing with age. Parity was associated with incontinence, and the first delivery was the most significant. The association was strongest in the age group 20-34 years with RR 2.2 (95% confidence interval [CI]1.8, 2.6) for primiparous women and 3.3 (2.4, 4.4) for grand multiparous women. A weaker association was found in the age group 35-64 years (RRs between 1.4 and 2.0), whereas no association was found among women over 65 years. For stress incontinence in the age group 20-34 years, the RR was 2.7 (2.0, 3.5) for primiparous women and 4.0 (2.5, 6.4) for grand multiparous women. There was an association with parity also for mixed incontinence, but not for urge incontinence. Severity was not clinically significantly associated with parity.

CONCLUSION: Parity is an important risk factor for female urinary incontinence in fertile and peri- and early postmenopausal ages. Only stress and mixed types of incontinence are associated with parity. All effects of parity seem to disappear in older age.

OBJECTIVE: To evaluate risk factors for anal incontinence using an identical twin sisters study design to provide control over genetic variance.

METHODS: A total of 271 identical twin sister pairs (mean age 47 years) completed the validated Colorectal Anal Distress Inventory questionnaire detailing the presence and severity of anal incontinence. Data were analyzed using a stepwise logistic regression with repeated binary measures to account for correlated data within twin pairs. Three different statistical models were used to analyze nonobstetric as well as obstetric risk factors separately.

RESULTS: Significant risk factors for anal incontinence and higher Colorectal Anal Distress Inventory anal incontinence subscale scores included age 40 years or older (fecal: odds ratio [OR]2.82, 95% confidence interval [CI]1.21-6.0; flatal: OR 1.90, 95% CI 1.11-3.24), menopause (fecal: OR 2.10, 95% CI 1.15-3.8; flatal: OR 2.11, 95% CI 1.43-3.13), increasing parity (parity>or = 2; fecal: OR 3.09, 95% CI 1.25-7.65; flatal: OR 2.72, 95% CI 1.65-4.51), and the presence of stress urinary incontinence (fecal: OR 2.11, 95% CI 1.12-3.98; flatal: OR 1.72, 95% CI 1.14-2.59). Obesity was associated with significantly higher Colorectal Anal Distress Inventory anal incontinence subscale scores (mean difference 5.18, P = .007). Cesarean delivery after initiation of labor was associated with a lower prevalence of anal incontinence than vaginal birth; however, this difference was not statistically significant (17% compared with 4%, P = .11). No anal incontinence was noted in women who had only elective cesarean deliveries.

CONCLUSION: Age, menopause, obesity, parity, and stress urinary incontinence are the major risk factors for female anal incontinence.

OBJECTIVE: We studied a large cohort of identical twin sisters, utilizing the unique properties of a twin research design to explore the relationship between obstetrical delivery mode and stress urinary incontinence.

STUDY DESIGN: An anonymous 67-item survey was completed by 271 identical twin pairs (n = 542) at the world's largest annual gathering of twins. Logistic regression for repeated binary measures was used to evaluate risk factors and accounting for shared genetics within pairs.

RESULTS: The twins had a mean age of 47.1 years (range 15 to 85 years), and stress urinary incontinence was reported by 51.8%. Stress urinary incontinence was associated with age (P = .001), parity (P = .001), obesity (P = .002), and birth mode, with vaginal delivery conferring a considerable increase in stress urinary incontinence risk relative to cesarean section (odds ratio 2.28, 95% confidence interval 1.14 to 4.55, P = .019).

CONCLUSION: Vaginal delivery mode represents a potent determinant of stress urinary incontinence, carrying more than twice the risk of cesarean section. This study of identical twins provides new insight into the epidemiology of female incontinence.

OBJECTIVE: To estimate the annual direct cost to society of pelvic organ prolapse operations in the United States.

METHODS: We multiplied the number of pelvic organ prolapse operations identified in the 1997 National Hospital Discharge Survey by national average Medicare reimbursement for physician services and hospitalizations. Although this reimbursement does not estimate the actual cost, it is a proxy for cost, which estimates what society pays for the procedures.

RESULTS: In 1997, direct costs of pelvic organ prolapse surgery were 1012 million dollars (95% confidence interval [CI]775 dollars, 1251 million), including 494 dollars million (49%) for vaginal hysterectomy, 279 million dollars (28%) for cystocele and rectocele repair, and 135 million dollars (13%) for abdominal hysterectomy. Physician services accounted for 29% (298 million dollars) of total costs, and hospitalization accounted for 71% (714 million dollars). Twenty-one percent of pelvic organ prolapse operations included urinary incontinence procedures (218 million dollars). If all operations were reimbursed by non-Medicare sources, the annual estimated cost would increase by 52% to 1543 million dollars.

CONCLUSION: The annual direct costs of operations for pelvic organ prolapse are substantial.

STUDY OBJECTIVE: To compare obstetric histories of women who had surgical correction of urinary incontinence or pelvic organ prolapse with a similar group who did not.

DESIGN: Case control study (Canadian Task Force classification II-2).

SETTING: Urban, community-based, private practice teaching hospital.

PATIENTS: Four hundred eighty women (age 51.4 +/- 13.0 yrs) who underwent corrective surgery for urinary incontinence, pelvic organ prolapse, or both, and whose obstetric history was obtainable through chart review. The control group was composed of 150 women (age 50.7 +/- 9.6 yrs) having routine screening mammography who completed a questionnaire regarding obstetric, gynecologic, and urologic history.

MEASUREMENTS AND MAIN RESULTS: Patients and controls did not differ significantly in terms of age, race, height, weight, body mass index, or smoking history. Women who underwent surgery were of greater parity (2.5 +/- 1.2 vs 2.0 +/- 1.2, p<0.001), less often nulliparous (3% vs 18%, p<0.001), less likely to have had a cesarean delivery (4% vs 15%, p<0.001), and more likely to have had a vaginal delivery (94% vs 77%, p<0.001) than those with no surgery. The odds ratio of patients who had a vaginal delivery compared with controls was 4.7 (2.3-8.3), and that for cesarean delivery was 0.22 (0.11-0.43). Analysis of specific delivery information found that, compared with controls, patients were older by 4 years at time of their first delivery (28.9 +/- 4.9 vs 24.9 +/- 4.9 yrs, p<0.001) and more commonly received epidural analgesia intrapartum (87% vs 40%, p = 0.004). Comparisons within the patient group, categorized by indication for surgery, revealed that women who had surgery for either prolapse alone or for both prolapse and incontinence were most likely to have had vaginal deliveries (85% incontinence alone vs 94% prolapse alone vs 97% both, p<0.001).

CONCLUSION: Increased parity, vaginal childbirth, maternal age at time of delivery, and use of epidural analgesia are associated with need for operative correction of pelvic organ prolapse or adult urinary incontinence. Conversely, cesarean delivery is associated with less need for surgical correction of incontinence or pelvic organ prolapse.

OBJECTIVE: To identify demographic, obstetric, and gynecologic risk factors associated with the development of pelvic floor disorders in women who undergo surgical correction.

METHODS: We conducted a case-control study, with cases selected from all women who had surgery by our urogynecology service from July 1, 1999 to July 1, 2000 and who had a first obstetric delivery at Magee Womens Hospital (n = 80). Controls were patients seen in the general gynecology office over the same time period who had no complaints associated with pelvic floor disorders in the previous 3 years, less than stage I prolapse on pelvic examination, and first obstetric delivery at Magee Womens Hospital (n = 176). Demographic, obstetric, and gynecologic variables were compared between cases and controls.

RESULTS: There were no significant differences in race, current age, gravidity, or parity. Cases were more likely than controls to have a higher body mass index (BMI) (28.6 +/- 6.3 versus 26.4 +/- 6.1 kg/m(2), P =.01), to be younger at first delivery (25.8 +/- 5.3 versus 28.4 +/- 4.9 years, P<.001), to have undergone a forceps delivery (64% versus 44%, P<orr =.001), and to have had previous gynecologic surgery (34% versus 16%, P =.003). Using logistic regression modeling, all of these factors were found to be independently associated with pelvic floor disorders. After menopause, use of hormone replacement therapy 5 or more years was protective (P =.001).

CONCLUSION: In our surgical patients, younger age at first delivery, higher BMI, forceps delivery, and history of gynecologic surgery were significantly associated with subsequent development of pelvic floor disorders.

OBJECTIVE: We conducted a case-control study to analyze risk factors for urogenital prolapse requiring surgery.

METHODS: Cases were 108 women with a diagnosis of II or III degree uterovaginal prolapse and/or third degree cystocele. Controls were 100 women admitted to the same hospitals as the cases, for acute, non-gynecological, non-neoplastic conditions.

RESULTS: Occupation showed an association with urogenital prolapse: in comparison with professional/managerial women, housewives had an odds ratios (OR) of urogenital prolapse of 3.1 (95% confidence interval (CI), 1.6-8.8). Compared with nulliparae, parous women tended to have a higher risk of genital prolapse (OR 2.6, 95% CI 0.9-7.8). In comparison with women reporting no vaginal delivery, the ORs were 3.0 for women reporting one vaginal delivery (95% CI 1.0-9.5), and 4.5 (95% CI 1.6-13.1) for women with two or more vaginal deliveries. Forceps delivery and birthweight were not associated with risk of prolapse after taking into account the effect of number of vaginal deliveries. The risk of urogenital prolapse was higher in women with mother or sisters reporting the condition: the ORs were, respectively, 3.2 (95% CI 1.1-7.6) and 2.4 (95% CI 1.0-5.6) in comparison with women whose mother or sisters reported no prolapse.

CONCLUSIONS: Our data support the clinical suggestion that parous women are at a higher risk of prolapse and the risk increases with number of vaginal deliveries. First-degree family history of prolapse seems to increase the risk of prolapse.

OBJECTIVE: To determine the predictive factors for genital prolapse.

STUDY DESIGN: We studied 85 young (<or = 45 year old) women who had been operated on for genital prolapse. The control group consisted of women of the same age operated on for benign ovarian tumor.

RESULTS: In the study group the number of deliveries was higher and the babies were heavier than in the control group. However, the study group had not had more instrumental deliveries. In addition, the women with prolapses more often had operations of abdominal hernias and also had more chronic pulmonary disease, e.g. asthma. The incidence of preterm delivery was the same in the women with genital prolapse as in the controls. Familial incidence of genital prolapse was about 30%.

CONCLUSION: Our study confirms that there are both acquired and congenital factors that predispose women to genital prolapse.

OBJECTIVE: To define the prevalence of pelvic floor disorders in a non-institutionalised community and to determine the relationship to gender, age, parity and mode of delivery.

DESIGN: A representative population survey using the 1998 South Australian Health Omnibus Survey.

SAMPLE: Random selection of 4400 households; 3010 interviews were conducted in the respondents' homes by trained female interviewers. This cross sectional survey included men and women aged 15-97 years.

RESULTS: The prevalence of all types of self-reported urinary incontinence in men was 4.4% and in women was 35.3% (P<0.001). Urinary incontinence was more commonly reported in nulliparous women than men and increased after pregnancy according to parity and age. The highest prevalence (51.9%) was reported in women aged 70-74 years. The prevalence of flatus and faecal incontinence was 6.8% and 2.3% in men and 10.9% and 3.5% in women, respectively. Pregnancy (>20 weeks), regardless of the mode of delivery, greatly increased the prevalence of major pelvic floor dysfunction, defined as any type of incontinence, symptoms of prolapse or previous pelvic floor surgery. Multivariate logistic regression showed that, compared with nulliparity, pelvic floor dysfunction was significantly associated with caesarean section (OR 2.5, 95% CI 1.5-4.3), spontaneous vaginal delivery (OR 3.4, 95% CI 2.4-4.9) and at least one instrumental delivery (OR 4.3, 95% CI 2.8-6.6). The difference between caesarean and instrumental delivery was significant (P<0.03) but was not for caesarean and spontaneous delivery. Other associations with pelvic floor morbidity were age, body mass index, coughing, osteoporosis, arthritis and reduced quality of life scores. Symptoms of haemorrhoids also increased with age and parity and were reported in 19.9% of men and 30.2% of women.

CONCLUSION: Pelvic floor disorders are very common and are strongly associated with female gender, ageing, pregnancy, parity and instrumental delivery. Caesarean delivery is not associated with a significant reduction in long term pelvic floor morbidity compared with spontaneous vaginal delivery.