Variation across operating sites in urinary and sexual outcomes after radical prostatectomy in localized and locally advanced prostate cancer

Transforming a Large-Scale Prostate Cancer Outcomes Dataset to the OMOP Common Data Model-Experiences from a Scientific Data Holder's Perspective

To enhance international and joint research collaborations in prostate cancer research, data from different sources should use a common data model (CDM) that enables researchers to share their analysis scripts and merge results. The OMOP CDM maintained by OHDSI is such a data model developed for a federated data analysis with partners from different institutions that want to jointly investigate research questions using clinical care data. The German Cancer Society as the scientific lead of the Prostate Cancer Outcomes (PCO) study gathers data from prostate cancer care including routine oncological care data and survey data (incl. patient-reported outcomes) and uses a common data specification (called OncoBox Research Prostate) for this purpose. To further enhance research collaborations outside the PCO study, the purpose of this article is to describe the process of transferring the PCO study data to the internationally well-established OMOP CDM. This process was carried out together with an IT company that specialised in supporting research institutions to transfer their data to OMOP CDM. Of n = 49,692 prostate cancer cases with 318 data fields each, n = 392 had to be excluded during the OMOPing process, and n = 247 of the data fields could be mapped to OMOP CDM. The resulting PostgreSQL database with OMOPed PCO study data is now ready to use within larger research collaborations such as the EU-funded EHDEN and OPTIMA consortium.

International Variations in Surgical Quality of Care in Men With Prostate Cancer: Results From the TrueNTH Global Registry

PURPOSE

Functional problems such as incontinence and sexual dysfunction after radical prostatectomy (RP) are important outcomes to evaluate surgical quality in prostate cancer (PC) care. Differences in survival after RP between countries are known, but differences in functional outcomes after RP between providers from different countries are not well described.

METHODS

Data from a multinational database of patients with PC (nonmetastatic, treated by RP) who answered the EPIC-26 questionnaire at baseline (before RP, T0) and 1 year after RP (T1) were used, linking survey data to clinical information. Casemix-adjusted incontinence and sexual function scores (T1) were calculated for each country and provider on the basis of regression models and then compared using minimally important differences (MIDs).

RESULTS

A total of 21,922 patients treated by 151 providers from 10 countries were included. For the EPIC-26 incontinence domain, the median adjusted T1 score of countries was 76, with one country performing more than one MID (for incontinence: 6) worse than the median. Eighteen percent of the variance (R2) of incontinence scores was explained by the country of the providers. The median adjusted T1 score of sexual function was 33 with no country performing perceivably worse than the median (more than one MID worse), and 34% (R2) of the variance of the providers' scores could be explained by country.

CONCLUSION

To our knowledge, this is the first comparison of functional outcomes 1 year after surgical treatment of patients with PC between different countries. Country is a relevant predictor for providers' incontinence and sexual function scores. Although the results are limited because of small samples from some countries, they should be used to enhance cross-country initiatives on quality improvement in PC care.

Individualized center-based analysis of urinary and sexual functional outcome after radical prostatectomy based on the prostate cancer outcome study: a post hoc pathway to patient outcome measurement analysis for quality improvement

PURPOSE

We evaluate differences of patient-reported outcome measurements (PROM) based urinary continence and sexual function 12 months after radical prostatectomy (RPE) based on perioperative, surgical, and patient-specific characteristics in a large European academic urology center.

MATERIALS AND METHODS

All men enrolled in the Prostate Cancer Outcome Study (PCO) study who were treated with RPE between 2017 and 2021 completed EPIC-26 information surveys before and 12 months after RPE. Survey data were linked to clinical data of our institution. Logistic regression analyses were performed to examine the correlation between individual surgeons, patient characteristics, patient clinical data, and their urinary continence and sexual function.

RESULTS

In total, data of 429 men were analyzed: unstratified mean (SD) EPIC-26 domain score for urinary function decreased from 93.3 (0.7) to 60.4 (1.5) one year after RPE, respectively for sexual function from 64.95 (1.6) to 23.24 (1.1). Patients with preoperative adequate urinary function (EPIC-26 score > 80) reported significantly different mean urinary function scores between 53.35 (28.88) and 66.25 (25.15), p= 0.001, stratified by surgeons experience. On binary logistic regression analyses, only nerve sparing techniques (OR: 1,83, 95% CI: 1.01;3.21; p = 0.045) and low body mass index (OR: 0.91, CI: 0.85;0.99, p= 0.032) predicted adequate postoperative urinary function.

CONCLUSIONS

The results show how using provider-specific data from a larger cohort study enables to develop institution-specific analysis for functional outcomes after RPE. These models can be used for internal quality improvement as well as enhanced and provider-specific patient communication and shared decision making.

[Urinary incontinence after radical prostatectomy for prostate cancer-data from 17,149 patients from 125 certified centers]

BACKGROUND

In addition to erectile dysfunction, urinary incontinence is the most common functional limitation after radical prostatectomy (RPE) for prostate cancer (PCa). The German S3 guideline recommends informing patients about possible effects of the therapy options, including incontinence. However, only little data on continence from routine care in German-speaking countries after RPE are currently available, which makes it difficult to inform patients.

OBJECTIVE

The aim of this work is to present data on the frequency and severity of urinary incontinence after RPE from routine care.

MATERIALS AND METHODS

Information from the PCO (Prostate Cancer Outcomes) study is used, which was collected between 2016 and 2022 in 125 German Cancer Society (DKG)-certified prostate cancer centers in 17,149 patients using the Expanded Prostate Cancer Index Composite Short Form (EPIC-26). Changes in the "incontinence" score before (T0) and 12 months after RPE (T1) and the proportion of patients who used pads, stratified by age and risk group, are reported.

RESULTS

The average score for urinary incontinence (value range: 0-worst possible to 100-best possible) was 93 points at T0 and 73 points 12 months later. At T0, 97% of the patients did not use a pad, compared to 56% at T1. 43% of the patients who did not use a pad before surgery used at least one pad a day 12 months later, while 13% use two or more. The proportion of patients using pads differs by age and risk classification.

CONCLUSION

The results provide a comprehensive insight into functional outcome 12 months after RPE and can be taken into account when informing patients.

Prediction models of incontinence and sexual function one year after radical prostatectomy based on data from 20 164 prostate cancer patients

BACKGROUND

Incontinence and sexual dysfunction are long-lasting side effects after surgical treatment (radical prostatectomy, RP) of prostate cancer (PC). For an informed treatment decision, physicians and patients should discuss expected impairments. Therefore, this paper firstly aims to develop and validate prognostic models that predict incontinence and sexual function of PC patients one year after RP and secondly to provide an online decision making tool.

METHODS

Observational cohorts of PC patients treated between July 2016 and March 2021 in Germany were used. Models to predict functional outcomes one year after RP measured by the EPIC-26 questionnaire were developed using lasso regression, 80-20 splitting of the data set and 10-fold cross validation. To assess performance, R2, RMSE, analysis of residuals and calibration-in-the-large were applied. Final models were externally temporally validated. Additionally, percentages of functional impairment (pad use for incontinence and firmness of erection for sexual score) per score decile were calculated to be used together with the prediction models.

RESULTS

For model development and internal as well as external validation, samples of 11 355 and 8 809 patients were analysed. Results from the internal validation (incontinence: R2 = 0.12, RMSE = 25.40, sexual function: R2 = 0.23, RMSE = 21.44) were comparable with those of the external validation. Residual analysis and calibration-in-the-large showed good results. The prediction tool is freely accessible: https://nora-tabea.shinyapps.io/EPIC-26-Prediction/.

CONCLUSION

The final models showed appropriate predictive properties and can be used together with the calculated risks for specific functional impairments. Main strengths are the large study sample (> 20 000) and the inclusion of an external validation. The models incorporate meaningful and clinically available predictors ensuring an easy implementation. All predictions are displayed together with risks of frequent impairments such as pad use or erectile dysfunction such that the developed online tool provides a detailed and informative overview for clinicians as well as patients.

Outcome Quality After Colorectal Cancer Resection in Certified Colorectal Cancer Centers–Patient-Reported and Short-Term Clinical Outcomes

BACKGROUND

In this observational study, patient-reported outcomes and short-term clinical outcome parameters in patients with colorectal cancer were studied 12 months after the start of treatment. Outcomes were also compared across German Certified Colorectal Cancer Centres.

METHODS

Data were collected from 4239 patients with colorectal cancer who had undergone elective tumor resection in one of 102 colorectal cancer centers and had responded to a quality-of-life questionnaire before treatment (EORTC QLQ-C30 and -CR29). 3142 (74.1%) of these patients completed a post-treatment questionnaire 12 months later. Correlation analyses were calculated and case-mix adjusted comparisons across centers were made for selected patient-reported outcomes, anastomotic insufficiency, and 30-day-mortality.

RESULTS

At 12 months, mild improvements were seen in mean quality-of-life scores (66 vs. 62 points), constipation (16 vs. 19), and abdominal pain (15 vs. 17). Worsening was seen in physical function (75 vs. 82) and pain (22 vs. 19). Better patient-reported outcomes at 12 months were associated with better scores before treatment. Better results in at least three of the five scores were associated with male sex, higher educational level, higher age, and private health insurance. Major worsening of fecal incontinence was seen among patients with rectal cancer without a stoma. The largest differences across centers were found with respect to physical function. Anastomotic insufficiency was found in 4.3% of colon cancer patients and 8.2% of rectal cancer patients. 1.9% of patients died within 30 days after their resection.

CONCLUSION

Clinicians can use these findings to identify patients at higher risk for poorer patient-reported outcomes. The differences among cancer centers that were found imply that measures for quality improvement would be desirable.