External Quality Assurance (EQA) of G6PD Quantitative Test

External Quality Assurance (EQA) of G6PD Quantitative Test

Survey No. : RH2017-02	Sample sent on : 2017/04/17	Reporting deadline : 2017/04/24

Sample sent : 21 set	Results reported (%) : 21 (100%)

1.Summary report on this EQA survey	4.Long term observation of inter laboratory CV vs. surveys
2.The distribution of G6PD reported in this survey	5.Long term observation of inter laboratory CV vs. G6PD activities
3.The distribution of Hb reported in this survey	6.Deviation graph for individual laboratory

Summary Report of G6PD and Hemoglobin (Hb) Quantitative Test Results

Lab

Referral
Hosp.

Report
(day)

Sample 1

Sample 2

Sample 3

Hb 1

Hb 2

Hb 3

(U/gHb)

D%

z score

SDI

(U/gHb)

D%

z score

SDI

(U/gHb)

D%

z score

SDI

(g/dL)

(g/dL)

(g/dL)

RH01

RH01

1

5.9

1.7%

0.2

0.0

16.4

5.1%

0.7

0.7

14.1

0.0%

0.0

-0.4

2.4

2.5

2.2

RH02

RH02

3

6.1

5.2%

0.7

0.5

14.5

-7.1%

-1.0

-1.0

14.1

0.0%

0.0

-0.4

2.2

2.3

2.1

RH04

RH04

7

6.7

15.5%

2.2

1.9

17.2

10.3%

1.5

1.4

16.5

17.0%

2.4

2.7

2.2

2.1

2.3

RH05

RH05

3

6.7

15.5%

2.2

1.9

19.0

21.8%

3.1

3.1

13.9

-1.4%

-0.2

-0.6

2.3

2.1

2.4

RH06

RH06

7

5.6

-3.4%

-0.5

-0.7

14.4

-7.7%

-1.1

-1.1

14.1

0.0%

0.0

-0.4

2.3

2.5

2.1

RH07

RH07

4

6.1

5.2%

0.7

0.5

15.6

0.0%

0.0

0.0

14.7

4.3%

0.6

0.4

2.3

2.3

2.1

RH08

RH08

4

5.4

-6.9%

-1.0

-1.2

14.3

-8.3%

-1.2

-1.2

13.5

-4.3%

-0.6

-1.2

2.4

2.4

2.2

RH09

RH09

2

5.8

0.0%

0.0

-0.2

15.2

-2.6%

-0.4

-0.4

13.7

-2.8%

-0.4

-0.9

2.3

2.3

2.2

RH10

RH10

7

6.2

6.9%

1.0

0.7

16.3

4.5%

0.6

0.6

14.6

3.5%

0.5

0.3

2.3

2.4

2.1

RH12

RH12

7

5.5

-5.2%

-0.7

-1.0

16.6

6.4%

0.9

0.9

14.6

3.5%

0.5

0.3

2.1

2.2

2.1

RH13

RH13

2

5.7

-1.7%

-0.2

-0.5

15.7

0.6%

0.1

0.1

15.2

7.8%

1.1

1.0

2.3

2.3

2.1

RH14

RH14

4

5.8

0.0%

0.0

-0.2

15.1

-3.2%

-0.5

-0.5

13.9

-1.4%

-0.2

-0.6

2.4

2.4

2.2

RH18

RH18

2

5.8

0.0%

0.0

-0.2

15.7

0.6%

0.1

0.1

14.4

2.1%

0.3

0.0

2.4

2.4

2.3

RH19

RH19

2

5.3

-8.6%

-1.2

-1.4

14.8

-5.1%

-0.7

-0.7

13.5

-4.3%

-0.6

-1.2

2.2

2.2

2.1

A0189

A0189

2

5.4

-6.9%

-1.0

-1.2

15.0

-3.8%

-0.5

-0.5

13.7

-2.8%

-0.4

-0.9

2.1

2.3

2.0

A0203

A0203

3

6.3

8.6%

1.2

1.0

16.8

7.7%

1.1

1.1

15.5

9.9%

1.4

1.4

2.4

2.4

2.2

G026

G026

7

5.5

-5.2%

-0.7

-1.0

14.6

-6.4%

-0.9

-0.9

13.8

-2.1%

-0.3

-0.8

2.3

2.3

2.1

CL001

RH16

4

5.7

-1.7%

-0.2

-0.5

15.2

-2.6%

-0.4

-0.4

14.0

-0.7%

-0.1

-0.5

2.3

2.4

2.2

CL002

RH03
RH11
RH17
G031
B005
CL016
A0511

8

6.2

6.9%

1.0

0.7

16.9

8.3%

1.2

1.2

15.5

9.9%

1.4

1.4

2.2

2.2

2.0

CL014

CL014

4

5.9

1.7%

0.2

0.0

14.4

-7.7%

-1.1

-1.1

14.1

0.0%

0.0

-0.4

2.2

2.3

2.1

CL015B

CL015B

3

6.3

8.6%

1.2

1.0

16.0

2.6%

0.4

0.4

15.3

8.5%

1.2

1.2

2.2

2.2

2.1

Total participating laboratories = 21

Xa (Median)

-

4

5.8

15.6

14.1

2.3

2.3

2.1

u_Xa

-

-

0.101

0.266

0.185

-

-

-

σ_p

-

-

0.406

1.092

0.987

-

-

-

σ_p′

-

-

-

-

-

-

-

-

Range

-

1-8

5.3-6.7

14.3-19.0

13.5-16.5

2.1-2.4

2.1-2.5

2.0-2.4

n

-

-

21

21

21

21

21

21

Mean

-

-

5.9

15.6

14.4

2.3

2.3

2.1

S.D.

-

-

0.42

1.11

0.77

0.10

0.12

0.09

C.V.

-

-

7.1%

7.1%

5.3%

4.3%

5.2%

4.3%

Note:
1.	D% = [ ( X - Xa ) / Xa ] x 100% ; X = Your Results , Xa = Assigned value
2.	u_Xa = uncertainty of the assigned value. u_Xa = 1.1 x SD / n^1/2
3.	SD for proficiency assessment ( σ_p ) = 7% x Xa ; but while Xa < 2.9 U/gHb, σ_p = 0.2 U/gHb
4.	Adjusted SD for proficiency assessment ( σ_p′ ) = ( σ_p² + u_Xa² )^1/2. σ_p′ is used for proficiency assessment when u_Xa ≥ 0.3σ_p
5.	z score = D /σ_p ; D = X - Xa, σ_p = SD for proficiency assessment
6.	SDI = ( X - Mean ) / SD ; SD = standard deviation of peer group ; SDI is not calculated when SD equals 0
7.	The assigned value ( Xa ) is the median of all the results reported of this EQA sample
8.	Robust results ( Mean and SD ) were calculated by Algorithm A according to ISO 13528
9.	The evaluation criteria for measurement result of each specimen : Acceptable : \| z \| <= 2; Caution : 2 < \| z \| <= 3; Unsatisfactory : \| z \| > 3
10.	Maximum Allowable Deviation ( MAD ) = 3 x ( σ_p / Xa ) x 100% or 3 x ( σ_p′ / Xa ) x 100% when u_Xa ≥ 0.3 σ_p

Ordered by Referral Hosp.

	Newborn Screening QA Program Preventive Medicine Foundation		Newborn Screening Reference Center National Institutes of Health
P.O. Box 624, Taipei Xinwei, Taipei City 10699, Taiwan			University of the Philippines
Tel : + 886-2-2703-6080; Fax : +886-2-2703-6070			625 Pedro Gil St., Ermita, Manila 1000, Philippines
			Fax : + 632-522-4396;

updated : 26 Apr, 2017