Repeated scan Age (years) P-value
< 10 10 to 19 20 to 29 30 to 39 40 to 49 50 to 59 60 to 69 70 >
N (%) N (%) N (%) N (%) N (%) N (%) N (%) N (%)
Yes 18 (9.8)a 50 (2.5) 10 (1.1) 6 (0.7) 8 (0.9) 19 (2.4) 12 (2.2) 2 (1.3) < 0.001a
No 165 (90.2) 2013 (97.5) 900 (98.9) 802 (99.3) 898 (99.1) 782 (97.6) 531 (97.8) 148 (98.7)
Total 183 (100) 2063 (100) 910 (100) 808 (100) 906 (100) 801 (100) 543 (100) 150 (100) -

aStatistically significant at level P < 0.05 (Chi-Squared test).
aAge categories, whose column proportions do not differ significantly from each other at the 0.05 level.
N = number.