Methods : Prospective cohort study of dental implant success rate in patients with AIDS [2]

Standard descriptive statistics were used to examine the distribution of key variables (age, gender, CD4 count at baseline and follow-up, and failure rate) in the sample. Due to the small sample size in this study (n = 16), the relationship of CD4 count and failure will be examined graphically and cases which failed are discussed individually in the “Results” section. A bar chart is presented to examine the relationship between implant survival and CD4 count at baseline. A non-parametric survival curve (using the Kaplan-Meier method) is estimated for individual implants (n = 33), which depicts the relationship between implant survivorship and time since procedure.