Wurapa F K, Bulsara M K, Boatin B A
J Trop Med Hyg. 1986 Feb;89(1):33-6.
The diagnosis of anaemia using conjunctival pallor was evaluated using the concept of predictive values. The presence or absence of pallor in 951 individuals and their haemoglobin levels were matched, defining haemoglobin of 10 g dl-1 or less as representing anaemia. The sensitivity and specificity of the test of pallor were 18.6% and 95.8%, respectively. At 16.3% prevalence of anaemia the positive and negative predictive values were 46.3% and 85.8%, respectively. The findings suggest that conjunctival pallor as a screening test for anaemia may not be very reliable.
利用预测值的概念对通过结膜苍白诊断贫血进行了评估。对951名个体的结膜苍白情况与其血红蛋白水平进行了匹配，将血红蛋白水平为10 g dl-1或更低定义为贫血。结膜苍白检测的敏感性和特异性分别为18.6%和95.8%。在贫血患病率为16.3%时，阳性预测值和阴性预测值分别为46.3%和85.8%。研究结果表明，结膜苍白作为贫血筛查试验可能不太可靠。
