marginal significanceP =0.052
The proportion of FF increased (9.8±1.9 to 17.3±2.9%, P =0.030), whereas the proportion of DC decreased significantly (12.7±1.8 to 8.1±1.7%, P =0.026) and that of NC decreased with marginal significance (21.1±1.8 to 15.4±2.2%, P =0.052).