Figure 1From: Inter-laboratory validation of the measurement of follicle stimulating hormone (FSH) after various lengths of frozen storageAssay measurement agreement by batch and paired labs. For each graph, the difference between the FSH (mIUm/L) values between two labs is plotted on the y-axis, and the x-axis represents the mean Time 0 Lab A assay value. The degree of agreement is estimated by calculating the bias, which is represented by the horizontal dashed lines at the mean ± 2 standard deviations. Each graph contains a comparison between two labs in one batch of samples.Back to article page