Table 3.

ACF count at year 1 by ACF count at year 0

No. of ACF at year 1
012-34-67+Any ACFMean no.
No. of ACF at year 0Nn (%)n (%)n (%)n (%)n (%)n (%)
013676 (56)22 (16)25 (18)10 (7)3 (2)60 (44)1.2
16722 (33)27 (40)12 (18)3 (5)3 (4)45 (67)1.4
2-312746 (36)28 (22)29 (23)20 (16)4 (3)81 (64)1.7
4-68322 (27)8 (10)22 (27)21 (25)10 (12)61 (73)3.0
7+212 (10)01 (5)11 (52)7 (33)19 (90)5.5

NOTE: Correlation in ACF count at year 0 and year 1 within subjects was 0.44 (P < 0.0001).