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Table 1 Characteristics of ADR reports according to age group

From: Characteristics of pediatric adverse drug reaction reports in the Japanese Adverse Drug Event Report Database

 Age group
 < 10 years
n = 11,786 (55.2%)
10–19 years
n = 9573 (44.8%)
Sex
 Boy, n (%)6305 (53.5)4910 (51.3)
 Girl, n (%)4777 (40.5)4449 (46.5)
 Unexplained, n (%)704 (6.0)214 (2.2)
Report source
 Company, n (%)11,652 (98.9)9430 (98.5)
 Healthcare facility, n (%)134 (1.1)143 (1.5)
Reporter
 Doctor, n (%)10,002 (78.4)7901 (74.8)
 Pharmacist, n (%)1218 (9.5)1208 (11.4)
 Healthcare professional, n (%)430 (3.4)480 (4.5)
 Consumer, n (%)449 (3.5)501 (4.7)
 Lawyer, n (%)2 (0.0)0 (0.0)
 Unexplained, n (%)656 (5.1)472 (4.5)
 Total, n (%)12,757 (100)10,562 (100)
Number of suspected drugs per ADR report
 1, n (%)8248 (70.0)6679 (69.8)
 2, n (%)1824 (15.5)1449 (15.1)
 3, n (%)798 (6.7)634 (6.6)
 4, n (%)394 (3.3)322 (3.4)
 5, n (%)234 (2.0)165 (1.7)
 6, n (%)100 (0.8)131 (1.4)
 7, n (%)71 (0.6)68 (0.7)
 8, n (%)52 (0.4)33 (0.3)
 9, n (%)24 (0.2)31 (0.3)
  ≥ 10, n (%)41 (0.3)61 (0.6)
Number of suspected drugs per fatal ADR report (n)
 1, n (%)328 (4.0)215 (3.2)
 2, n (%)93 (5.1)61 (4.2)
 3, n (%)57 (7.1)38 (6.0)
 4, n (%)28 (7.1)16 (5.0)
  ≥ 5, n (%)46 (8.8)39 (8.0)
 Total, n (%)552 (4.7)369 (3.9)
  1. Abbreviation: ADR: adverse drug reaction