Roche Platform Transition

This page compares reference ranges between the Roche and Beckman platforms for the selected category of tests. For a description of the transition from the Bechman to Roche automated chemistry platform, please see the Roche Transition guideline.

All BMP Liver Kidney Misc

Method Comparison

The slope of the linear regression of Roche onto Beckman represents the proportional bias between the two methods (i.e., the proportional change going from Beckman to Roche). The mean bias is expressed as a % or an absolute bias depending on whether there is a proportional bias between Beckman and Roche or a constant bias. A positive mean bias means that Roche results are higher than Beckman results, on average. While it is not recommended to use this information to convert one result directly to the other, the data will help when comparing results across platforms.

Tests with significantly different performance characteristics are reported using different component names and are not trendable in Epic.

Test Name	Beckman Code	Roche Code	Same code/Trendable?	Mean Bias	Slope of the Linear Regression (Roche vs. Beckman)	Coefficient of Determination (R²)
Urea Nitrogen	BUN	BUN	✅	-3.3%	0.98	1.00
Creatinine	CRE	CRE	✅	0.02 mg/dL	0.98	1.00
Potassium	K	K	✅	0.06 mEq/L	0.99	1.00
Magnesium	MG	MG	✅	4.1%	0.97	0.93
Phosphate	P	P	✅	-0.16 mg/dL	0.99	0.99

Reference Ranges

Name

Beckman

Roche

Urea Nitrogen

Name: Urea Nitrogen
Mnemonic: BUN
Units: mg/dL
Method Code: default

Female		Male		Unknown
Age	Range	Age	Range	Age	Range
0-	8-21	0-	8-21	0-	8-21

Effective date: 03/01/2015

Name: Urea Nitrogen
Mnemonic: BUN
Units: mg/dL
Method Code: PENPU1

Female		Male		Unknown
Age	Range	Age	Range	Age	Range
0-	6-20	0-	6-20

Effective date: 12/10/2025

Creatinine

Name: Creatinine
Mnemonic: CRE
Units: mg/dL
Method Code: default

Female		Male		Unknown
Age	Range	Age	Range	Age	Range
0-17y	0.20-1.10	0-17y	0.20-1.10
18y-	0.38-1.02	18y-	0.51-1.18

Effective date: 03/01/2015

Name: Creatinine
Mnemonic: CRE
Units: mg/dL
Method Code: PENPU1

Female		Male		Unknown
Age	Range	Age	Range	Age	Range
0-	0.50-1.00	0-	0.70-1.20	0-	0.50-1.00

Effective date: 12/12/2025

Potassium

Name: Potassium
Mnemonic: K
Units: mEq/L
Method Code: default

Female		Male		Unknown
Age	Range	Age	Range	Age	Range
0-	3.6-5.2	0-	3.6-5.2	0-	3.6-5.2

Effective date: 03/01/2015

Name: Potassium
Mnemonic: K
Units: mEq/L
Method Code: PENPU1

Female		Male		Unknown
Age	Range	Age	Range	Age	Range
0-	3.5-5.1	0-	3.5-5.1

Effective date: 11/27/2025

Magnesium

Name: Magnesium
Mnemonic: MG
Units: mg/dL
Method Code: default

Female		Male		Unknown
Age	Range	Age	Range	Age	Range
0-	1.8-2.4	0-	1.8-2.4	0-	1.8-2.4

Effective date: 03/01/2015

Name: Magnesium
Mnemonic: MG
Units: mg/dL
Method Code: PENPU1

Female		Male		Unknown
Age	Range	Age	Range	Age	Range
0-	1.6-2.6	0-	1.6-2.6

Effective date: 11/27/2025

Phosphate

Name: Phosphate
Mnemonic: P
Units: mg/dL
Method Code: default

Female		Male		Unknown
Age	Range	Age	Range	Age	Range
0-11y	4.5-6.0	0-11y	4.5-6.0	0-11y	4.5-6.0
12y-	2.5-4.5	12y-	2.5-4.5	12y-	2.5-4.5

Effective date: 03/01/2015

Name: Phosphate
Mnemonic: P
Units: mg/dL
Method Code: PENPU1

Female		Male		Unknown
Age	Range	Age	Range	Age	Range
0-	2.5-4.5	0-	2.5-4.5

Effective date: 12/10/2025