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Table 2 Descriptive statistics including decision limits for the 6 unadjusted and adjusted GH-2000 scores

From: Statistical methodology for age-adjustment of the GH-2000 score detecting growth hormone misuse

Assay pair

 

n

mean

sa

Mean + 3.72*s

ub

DLc

P-III-NP

IGF-I

       

Siemens

LC-MS

Unadjusted Adjusted

947 947

6.5393 6.5382

1.2412 1.2424

11.1566 11.1599

0.1872 0.1874

11.34 11.35

Siemens

Immunotech

Unadjusted Adjusted

971 971

6.4292 6.4287

1.3189 1.3284

11.3355 11.3703

0.1965 0.1979

11.53 11.57

Siemens

IDS

Unadjusted Adjusted

970 970

5.9935 5.9931

1.1925 1.1954

10.4296 10.4400

0.1777 0.1782

10.61 10.62

Orion

LC-MS

Unadjusted Adjusted

966 966

4.7062 4.7047

1.2902 1.2976

9.5057 9.5318

0.1927 0.1938

9.70 9.73

Orion

Immunotech

Unadjusted Adjusted

999 999

4.5984 4.5984

1.3925 1.4077

9.7785 9.8350

0.2045 0.2068

9.98 10.04

Orion

IDS

Unadjusted Adjusted

992 992

4.1614 4.1611

1.2522 1.2610

8.8196 8.8520

0.1846 0.1859

9.00 9.04

  1. as is the standard deviation, bu is the uncertainty correction (13), cDL is the decision limit (12)