Correlation between HBsAg expression pattern in maternal placenta and the occurrence of intrauterine infection in infants.

<p>Out of the 33 samples of placental tissues examined, 15 were positive for immunostaining for HBsAg.</p><p>Comparison of intrauterine infection rate between HBsAg positive and negative in decidual cell layers: χ<sup>2</sup> = 0.268, P = 0.8000; comparison between HBsAg positive in decidual cell layers and negative in placenta: χ<sup>2</sup> = 1.814, P = 0.1822.</p><p>Comparison of intrauterine infection rate between HBsAg positive and negative in trophoblastic layer: χ<sup>2</sup> = 0.268, P = 0.4308; and between HBsAg positive in trophoblastic layer and negative in placenta: χ<sup>2</sup> = 2.052, P = 0.1938.</p><p>Comparison of intrauterine infection rate between HBsAg positive and negative in capillary endothelial cells: χ<sup>2</sup> = 10.313, P = 0.0088; and between HBsAg positive in capillary endothelial cells and negative in placenta: χ<sup>2</sup> = 10.610, P = 0.0098.</p><p>Comparison of intrauterine infection rate between HBsAg positive in decidual cell layer and trophoblastic layer: χ<sup>2</sup> = 0.037, P = 0.3870; and between HBsAg positive in decidual cell layer and capillary endothelial cells: χ<sup>2</sup> = 4.018, P = 0.07843.</p><p>Comparison of intrauterine infection rate between HBsAg positive in trophoblastic layer and capillary endothelial cells: χ<sup>2</sup> = 2.743, P = 0.1414.</p>