Table 4

Type of acetaminophen exposure or overdose that occurred with each International Classification of Disease (ICD-9) code used to document the emergency department (ED) visit, by age group
Age category Description ICD-9 code Visits Cases Unintentional, N (%; 95% CI) Intentional, N (%; 95% CI) Illicit unintended use, N (%; 95% CI)
Total N=1,215 N=316 N=172 N=139 N=5
Poisoning 965.4 290 269 146 (54.3; 48.1-60.3) 119 (44.2; 38.2-50.4) 4 (1.5; 0.4-3.8)
All ages Accidental E850.4 87 82 75 (91.5; 83.2-96.5) 6 (7.3; 2.7-15.2) 1 (1.2; 0.0-6.6)
(N=316) Accidental E850.7 1 1 1 (100.0; 2.5-100.0) 0 (0.0) 0 (0)
Suicide/self-inflicted E950.0 98 71 1 (1.4; 0.0-7.6) 70 (98.6; 92.4-100.0) 0 (0)
Age 0-5 Poisoning 965.4 140 133 133 (100; 97.3-100.0) 0 (0) 0 (0)
(N=154) Accidental E850.4 75 72 72 (100; 95.0-100.0) 0 (0) 0 (0)
Poisoning 965.4 62 57 8 (14.0; 6.3-25.8) 47 (82.5; 70.1-91.3) 2 (3.5; 0.4-12.1)
Age 6-14 Accidental E850.3 3 2 1 (50.0; 1.3-98.7) 1 (50.0; 1.3-98.7) 0 (0)
(N=71) Accidental E850.4 9 7 3 (42.9; 9.9-81.6) 4 (57.1; 18.4-90.1) 0 (0)
Suicide/self-inflicted E950.0 42 29 0 (0) 29 (100; 88.1-100.0) 0 (0)
Age 15-24 Poisoning 965.4 88 79 5 (6.3; 2.1-14.2) 72 (91.1; 82.6-96.4) 2 (2.5; 0.3-8.8)
(N=91) Accidental E850.4 3 3 0 (0) 2 (66.7; 9.4; 99.2) 1 (33.3; 0.8-90.6)
Suicide/self-inflicted E950.0 56 42 1 (2.4; 0.1-12.6) 41 (97.6; 87.4-99.9) 0 (0)

CI confidence intervals; Boldface type indicates codes who’s codes correctly identified intention type.

de Achaval et al.

de Achaval et al. BMC Health Services Research 2013 13:72   doi:10.1186/1472-6963-13-72

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