Table 4.

ACF prevalence and mean count across centers

Center
1234
N8512113395
Year 0
Prevalence79%74%59%67%
Mean count3.62.41.32.2
Year 1
Prevalence78%70%41%63%
Mean count3.62.00.81.9
Correlation of year 0 and year 1 count in subjects (P)0.62 (<0.0001)0.26 (0.004)0.27 (0.001)0.12 (0.3)

NOTE: P < 0.0001 for comparison across centers for both prevalence and mean count at both baseline and year 1. Prevalence and mean count for year 0 are calculated only for returning subjects.