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Published on: October 24, 2019
Diabetes Is a Risk Factor for Inflatable Penile Prosthesis Infection: Analysis of a Large Statewide Database
Michael J Lipsky1, Ifeanyi Onyeji1, Ron Golan2
1Department of Urology, New York Presbyterian Hospital/ Columbia University Medical Center, New York, NY, USA.
Introduction:
Although diabetes mellitus (DM) is often discussed as a risk factor for inflatable penile prosthesis (IPP) infection, the link between DM diagnosis and IPP infection remains controversial. High-quality population-based data linking DM to an increased risk of IPP infection have not been published.
Aim:
To evaluate the association of DM with IPP infection in a large public New York state database.
Methods:
The New York Statewide Planning and Research Cooperative System (SPARCS) database was queried for men who underwent initial IPP insertion from 1995-2014. Diabetic patients were identified using ICD-9-CM codes. Patients presenting for first operation with diagnosis or Current Procedural Terminology codes suggestive of prior IPP surgery were excluded. Chi-squared analyses were performed to compare infection rates in diabetics and non-diabetics within the pre- and postantibiotic impregnated eras. Multivariate Cox proportional hazards models were constructed to evaluate whether or not DM was independently associated with IPP infection in the time periods before (1995-2003) and after (2004-2014) the widespread availability of antibiotic impregnated penile prostheses.
Main Outcome Measure:
Time to prosthesis infection was measured.
Results:
14,969 patients underwent initial IPP insertion during the study period. The overall infection rate was 343/14,969 (2.3%). Infections occurred at a median 3.9 months after implant (interquartile ratio: 1.0-25.0 months). Infectious complications were experienced by 3% (133/4,478) of diabetic patients and 2% (210/10,491) of non-diabetic patients (P < .001). Diabetes was associated with a significantly increased IPP infection risk on multivariable analysis controlling for age, race, comorbidities, insurance status, annual surgeon volume, and era of implantation (Hazard Ratio: 1.32, 95% CI: 1.05-1.66, P = .016).
Conclusion:
Our analysis supports the notion that DM is a risk factor for IPP infection. This has important implications for patient selection and counseling, and raises the question of whether this increased risk can be mitigated by optimization of glycemic control before surgery. Lipsky MJ, Onyeji I, Golan R, et al. Diabetes Is a Risk Factor for Inflatable Penile Prosthesis Infection: Analysis of a Large Statewide Database. Sex Med 2019;7:35-40.
Insights
Diabetes mellitus (DM) increases the risk of inflatable penile prosthesis (IPP) infection. This study confirms DM as a risk factor, impacting patient selection and counseling for IPP surgery.
Area of Science:
- Urology
- Andrology
- Infectious Disease
Background:
- The association between diabetes mellitus (DM) and inflatable penile prosthesis (IPP) infection is debated.
- High-quality population-based evidence linking DM to increased IPP infection risk is lacking.
Purpose of the Study:
- To investigate the association between DM and IPP infection.
- Utilized a large public New York state database for analysis.
Main Methods:
- Analyzed data from the New York Statewide Planning and Research Cooperative System (SPARCS) database (1995-2014).
- Identified diabetic patients using ICD-9-CM codes and excluded those with prior IPP surgery.
- Employed Chi-squared analyses and multivariate Cox proportional hazards models to assess DM's independent association with IPP infection across different eras.
Main Results:
- 14,969 patients underwent initial IPP insertion; overall infection rate was 2.3%.
- Diabetic patients had a higher infection rate (3%) compared to non-diabetics (2%) (P < .001).
- DM independently increased IPP infection risk (Hazard Ratio: 1.32, P = .016) after controlling for covariates.
Conclusions:
- Diabetes mellitus is confirmed as a significant risk factor for inflatable penile prosthesis infection.
- Findings have implications for patient selection, counseling, and suggest exploring glycemic control optimization.
- Further research may investigate mitigating DM-related IPP infection risks.
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