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Percentage of Service Members and Their Dependents With CKD Stages 3–5 who have a Diagnosis Code for CKD in the Military Health System

Percentage of Service Members and Their Dependents With CKD Stages 3–5 who have a Diagnosis Code for CKD in the Military Health System

Overall, the percentage of service members and their dependents in the Military Health System (MHS) with chronic kidney disease (CKD) stages 3–5 based on available outpatient serum creatinine values who also had an ICD-9-CM diagnosis code for CKD increased from 28.5% in 2009 to 34.5% in 2015. Awareness of CKD in this population is higher than in the U.S. population (20.2%). Prevalence of CKD awareness among male service members and their dependents and those with more advanced CKD is higher than their female service members and their dependents.

Data Source: DoD-MHS

To view the percentage of service members and their dependents with CKD stages 3–5 who have a diagnosis code for CKD by risk categories, select from the drop-down menu below. Risk categories include Overall, Age, Sex, and CKD Stage.


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The majority of service members and their dependents did not have eGFR estimates (73%) and were assumed to not have eGFR < 60 ml/min/1.73m2; therefore, prevalence may be underestimated. Data are not adjusted.

The US Department of Defense Military Health System (MHS) provides comprehensive primary and specialty care for more than 9.6 million active-duty personnel and military retirees and their families worldwide. The MHS Data Repository (MDR) is the administrative claims database for all care received through MHS, including direct care received in military treatment facilities and purchased care received in civilian treatment facilities. The MDR does not capture health care delivery in combat zones or care received in the VHA system. All patients were in the TRICARE Prime managed care option. Data are from both the direct care (military facilities) and private care (private facilities through TRICARE coverage) systems.

De-identified patient data were obtained from the MHS data repository. Data contain both the estimated glomerular filtration rate (eGFR) definition of chronic kidney disease (CKD) and claims-based CKD defined by using ICD-9-CM and ICD-10-CM codes diagnosis codes with at least one inpatient or two outpatient CKD diagnoses. To be included in analyses, service members and their dependents had to have at least one inpatient or outpatient record during the fiscal year (October 1 to September 30). Data cells with 10 or fewer patients were suppressed.

Disclaimer: The views expressed are those of the authors and do not reflect the official policy of the Uniformed Services University, Departments of Army/Navy/Air Force, Department of Defense, Centers for Disease Control and Prevention, Department of Health and Human Services, or US government.

FieldData
Description of Measure

Service members and their dependents with CKD stages 3–5 who have a diagnosis code for CKD in the Military Health System.

Data Set

US Department of Defense Military Health System (MHS) Data Repository (MDR). MDR source files: CAPER (direct care outpatient claims), SIDR (direct care inpatient claims), TED-NI (purchased care outpatient claims), TED-I Header (purchased care inpatient claims), and VM6BEN (demographic information from the Defense Enrollment Eligibility Reporting System).

Population

Service members and their dependents in MHS.

Years Included

2009–2015.

Numerator

Service members and their dependents with an ICD-9-CM code for CKD.

Denominator

Service members and their dependents with outpatient serum creatinine measurement with estimated glomerular filtration rate (eGFR) < 60 ml/min/1.73m2 for at least 90 days.

Definition of CKD and CKD Stage

CKD is defined by eGFR; Stage 3: eGFR 30–59 ml/min/1.73 m²; Stage 4: eGFR 15–29 ml/min/1.73 m²; Stage 5: eGFR < 15 ml/min/1.73 m², excluding dialysis or transplant patients. Persistence of at least 90 days was required.

Estimated glomerular filtration rate (eGFR)

Based on CKD-EPI equation for calibrated creatinine: eGFR=141 x [min(serum creatinine in mg/dL) /κ, 1)]**α x [max(serum creatinine/κ, 1)]**-1.20 x 0.993**age x (1.018 if female) x (1.159 if Black).

κ = 0.7 if female, and 0.9 if male
α = -0.329 if female, and -0.411 if male
** = raise to the power

ICD-9-CM codes for CKD

016.0, 095.4, 189.0,189.1, 189.9, 236.91, 250.4, 250.41, 250.42, 250.43, 271.4, 274.10, 283.11, 403.xx, 404.xx, 405.01, 405.11, 440.1, 442.1, 447.3, 453.3, 573.4, 580.xx, 581.xx, 582.xx, 583.xx, 584.5, 585.x, 587.xx, 588.xx, 590.xx, 591, 592.x, 593.xx, 642.1, 646.2, 753.xx, 794.4 (x and xx stand for all the codes within the main diagnosis).

Serum Creatinine

Laboratory measurements taken during outpatient appointments.

Limitations of Indicator

Data is only available through 2015. The majority of service members and their dependents did not have eGFR estimates (73%) and were assumed to not have eGFR < 60 ml/min/1.73m2; therefore, prevalence may be underestimated.

Analytical Considerations

Service members and their dependents in MHS tend to be younger and healthier than the general population. Therefore, serum and urine creatinine and urine albumin are tested for less frequent compared to other health care systems.


eGFR Formula Disclaimer
At the time of the last data update in summer 2022, the race-free eGFR formula was newly recommended and impact on health outcomes is underway. To avoid inconsistent results caused by different formulae, stakeholders continued using the eGFR formula with race during this transition. Since then, comparisons have been made. The estimates for the current website launch are still based on analyses using the eGFR formula with race, however plan is to use race-free eGFR formula for the next data update and upcoming website launch in fall 2023.