Once the objective of the investigation had been explained to the central management team, and permission and informed consent of the participants had been obtained, tests began to be administered.
Once a satisfactory model had been obtained, tests for interaction were performed on likely combinations of variables.
After informed consent was obtained, tests for human immunodeficiency virus-1 (HIV) infection were offered and pretest counselling provided.
In our setting, the prevalence of chlamydia and gonorrhoea more than doubled with testing of multiple anatomic sites compared to obtained tests for urethral infection alone.
In order to confirm the data obtained, tests were carried out at 70°C, 80°C, and 90°C for 8 h, and the results (shown in Figure 2(b)) confirm the aforementioned behavior, with an initial enzyme inactivation, caused by thermal shock, and later stability.
For ordinal predictor variables (such as interest in caring for immigrant patients), we obtained tests of linear trend within the analysis of variance (this test separates the between-group sum of squares into a linear component, using one degree of freedom, and an extra-linear component).
