CSPD participant retention was high with 99% (184/186) of the non-deceased active participants completing follow-up at 10 years (i.e., 184/190 of original sample, 97%). The 5- and 10-year laboratory re-examination sessions were conducted in 156 and 163 participants, respectively. These rates represent 88% and 91% of the 178 and 179 participants eligible for re-examination at each phase, respectively.
