Normal reference intervals' for plasma Gc protein concentration in Saudis, using rate nephelometry

ABSTRACT

This study was conducted on 1534 Saudi males and females to establish 'normal reference intervals' for group specific component [Gc] protein concentration, using rate nephelometry. The reference intervals were established using mean +/- 2SD and 2.5th to 97.5th percentiles. In the overall population the Gc reference interval was 32.8 +/- 14 mg/dl, while in the male and female populations, the reference intervals were 31.6 +/- 13.2 mg/dl and 33.9 +/- 16 mg/dl respectively. When grouped on the basis of age, the lowest Gc level was in the age group [30 +/- 10 mg/dl] and the highest in the 31-40 years age group [34.6 +/- 18.2 mg/dl]. Beyond this age the level decreased to 30.7 +/- 16.4 mg/dl in the male and 32.0 +/- 1 5.6 mg/dl in the female. This paper presents Gc 'normal reference intervals in the Saudi population and discusses the results in relation to those reported for other populations