Table 4.

Composition of each inappropriate category

	overdosing	improper administration frequency	improper administration routes	contraindication	improper diluent volume	medication not allowed for pediatric patients	improper drug combination	repeated administration	indication-related off-label drug use	total
year
2019	75.68%	63.97%	46.36%	97.22%	91.67%	74.54%	62.90%	64.60%	67.10%	67.62%
2020	24.32%	36.03%	53.64%	2.78%	8.33%	25.46%	37.10%	35.40%	32.90%	32.38%
Age groups, years
< 2	9.97%	18.14%	15.13%	0.00%	10.42%	3.55%	0.00%	2.65%	15.31%	14.98%
2–5	57.72%	33.52%	38.12%	0.00%	46.53%	8.20%	1.61%	12.68%	31.96%	34.85%
6–11	26.91%	22.48%	24.90%	25.00%	35.94%	22.77%	32.26%	32.15%	20.96%	22.12%
12–17	5.39%	25.86%	21.84%	75.00%	7.12%	65.48%	66.13%	52.51%	31.77%	28.06%
categories by the ATC drug classification
AIA	0.23%	1.21%	5.94%	0.00%	0.00%	6.24%	72.58%	4.42%	0.81%	0.98%
ATM	0.22%	1.98%	2.11%	63.89%	0.17%	10.65%	1.61%	0.00%	12.24%	8.86%
BLD	0.06%	0.88%	8.62%	0.00%	1.04%	0.00%	8.06%	1.77%	6.05%	4.36%
CVS	0.47%	3.58%	0.38%	0.00%	0.00%	0.37%	4.84%	1.47%	3.98%	3.41%
DRM	0.00%	0.57%	0.57%	22.22%	0.00%	0.00%	0.00%	0.29%	7.00%	4.87%
GEN	0.05%	0.08%	0.77%	0.00%	0.00%	16.40%	0.00%	0.00%	0.17%	0.33%
HRM	1.32%	0.13%	11.69%	0.00%	0.00%	0.00%	0.00%	8.55%	0.86%	0.88%
INF	5.35%	8.96%	9.77%	0.00%	92.53%	20.69%	11.29%	0.59%	16.34%	14.33%
MSK	0.09%	0.24%	0.00%	5.56%	0.00%	18.97%	0.00%	2.06%	0.85%	0.85%
NRV	5.03%	15.95%	0.19%	0.00%	0.00%	24.97%	0.00%	5.60%	6.13%	7.87%
RES	78.36%	34.45%	49.04%	0.00%	0.35%	0.12%	1.61%	74.93%	36.29%	40.15%
SNS	0.00%	0.68%	9.20%	8.33%	0.00%	0.00%	0.00%	0.29%	2.81%	2.10%
TCM	8.77%	31.24%	0.96%	0.00%	5.90%	0.49%	0.00%	0.00%	5.92%	10.61%
Others	0.04%	0.05%	0.77%	0.00%	0.00%	1.10%	0.00%	0.00%	0.54%	0.40%