1. A method for determining results from an immunoassay, comprising: (a) testing a patient sample for the presence of a target analyte indicative of a condition or risk of having the condition by reacting the sample with antibodies specific for the analyte in a sandwich assay performed on a test strip, in which one of the antibodies is labeled with a detectable label; (b) detecting the signal produced by the label in a reflectance reader containing a reader head, wherein the reader head is parallel to the surface of the test strip; and (c) processing the data obtained from the reflectance signal obtained from reading the test strip into a result indicative of the presence or absence or a threshold concentration of analyte in a sample.