The “retrospective” cohort was those subjects who had both positive Lyme disease tests and contemporaneous clinical documentation supporting that diagnosis. The “referral” cohort included individuals
Objectives Low response rates in epidemiologic research potentially lead to the recruitment of a non-representative sample of controls in case-control studies. Problems in the unbiased estimation of o
SNP, single nucleotide polymorphism. Allele data and basic allelic Chi-square test were analyzed using Plink 1.07. Asymptotic P value, estimated odds ratio (OR) and 95% confidence interval (CI) were c
