Table 2.

Frequencies of self-harm method, body part injured, and place of occurrence captured in each data source

	Medical chart (%)	CHIRPP-SI (%)	NACRS (%)
Self-harm related to ED visit?
Yes	84 (33.6)	70 (28.0)	21 (8.4)
Self-harm method
Cutting	54 (64.3)	50 (71.4)	4 (19.1)
Poison/ingest	23 (27.4)	19 (27.1)	16 (76.2)
Scratch	10 (11.9)	3 (4.3)	0 (0.0)
Blunt	5 (6.0)	2 (2.9)	0 (0.0)
Asphyxiation	11 (13.1)	2 (2.9)	0 (0.0)
Burn	3 (3.6)	0 (0.0)	0 (0.0)
Other (hair pulling, “attacks self”, biting)	1 (1.2)	1 (1.4)	0 (0.0)
Missing	2 (2.4)	0 (0.0)	1 (4.8)
Body part injured
Arms/wrists/hands	52 (61.9)	40 (57.1)	3 (14.3)
Legs/thighs/hips	13 (15.5)	17 (24.3)	0 (0.0)
Internal (poisoning)	24 (28.6)	19 (27.1)	16 (76.2)
Neck	11 (13.1)	4 (5.7)	0 (0.0)
Head/face	7 (8.3)	3 (4.3)	0 (0.0)
Torso	5 (6.0)	3 (4.3)	0 (0.0)
Body (general)	0 (0.0)	2 (2.9)	0 (0.0)
Missing	13 (15.5)	1 (1.4)	2 (9.5)
Place of occurrence
Home (total)	13 (15.5)	63 (90.0)	0 (0.0)
Own bedroom	5 (6.0)	37 (52.9)	0 (0.0)
Sibling bedroom	0 (0.0)	1 (1.4)	0 (0.0)
Parent bedroom	0 (0.0)	2 (2.9)	0 (0.0)
Bathroom	1 (1.2)	15 (21.4)	0 (0.0)
Kitchen	1 (1.2)	6 (8.6)	0 (0.0)
Living room	0 (0.0)	1 (1.4)	0 (0.0)
Unspecified	6 (7.1)	1 (1.4)	0 (0.0)
School (total)	6 (7.1)	10 (14.3)	0 (0.0)
Bathroom	1 (1.2)	1 (1.4)	0 (0.0)
Classroom	0 (0.0)	1 (1.4)	0 (0.0)
Office	2 (2.4)	2 (2.9)	0 (0.0)
Library	0 (0.0)	1 (1.4)	0 (0.0)
Unspecified	3 (3.6)	5 (7.1)	0 (0.0)
Other community (total)	1 (1.2)	4 (5.7)	0 (0.0)
Significant other’s home	0 (0.0)	1 (1.4)	0 (0.0)
Friend	0 (0.0)	1 (1.4)	0 (0.0)
Public bathroom	0 (0.0)	2 (2.9)	0 (0.0)
Outside	1 (1.2)	0 (0.0)	0 (0.0)
Missing	65 (77.4)	0 (0.0)	21 (100.0)

If self-harm method was ingestion and body part was not applicable, this was not deemed missing. Percentages are calculated as a fraction of the total number of unique self-injurers for each respective dataset