a positive trendP = .01
Although a positive trend was observed prior to DHA-PI 6200.02, a decrease of 0.77 percentage points (95% CI, –1.34 to –0.20 percentage points; P = .01) occurred immediately after the policy implementation, followed by a significant increase after intervention of 0.07 percentage points per month (95% CI, 0.05 to 0.09 percentage points per month; P < .001).