Measuring engagement in deliberate self-harm behaviours: psychometric evaluation of six scales

BMC Psychiatry

Table 1 Summary of psychometric qualities

Short name of behavioural scale	Items	Sample	% DSH	Reliability	External validity
SIQTR-5	A1, B1,C1, D1, E1	84, females, EDTP, av.age 24	30.4%^a	α = 0.62^c	Common SHI items r = 0.43 - 0.75^h
SITBI-11	Q150: (1)-(11)	94, 77% females, MHU, av.age 17	68.1%^b	Κ =1.0^e	FASM, Κ = 1.0^e; r = 0.99^g
SITBI-11	Q150: (1)-(11)	94, 77% females, MHU, av.age 17	68.1%^b	ICC = .71^g	FASM, Κ = 1.0^e; r = 0.99^g
DSHI-16	Q1- Q16	150, 68% females, UG, age range 18 to 64	35%^b	Φ = 0.68^e, r = 0.92^f	MHhx, r= 0.49^e; BPO, r = 0.48^g; SA r = 0.21^g
DSHI-16	Q1- Q16	150, 68% females, UG, age range 18 to 64	35%^b	α =0.82^d	MHhx, r= 0.49^e; BPO, r = 0.48^g; SA r = 0.21^g
ISAS-12	Q1: (1)-(12)	235 UG (selected from 761 UG), 55% females, av.age 18	30.8%^b	r = 0.85^g	MSI-BPD, r = 0.37^g; YRBS SI item, r = 0.38^g; YRBS SA item, r = 0.28^g
ISAS-12	Q1: (1)-(12)	235 UG (selected from 761 UG), 55% females, av.age 18	30.8%^b	α =0.84^d
SHI-16	Q1-Q16	290, 52% females, UG, av.age 20	68%^b	Φ = 0.94^e, r = 0.84^f	NR
SHI-22	Q1–Q22	221, 90% females, MHU (4) PMC (104), EDTP/SATP (113), age range 17 to 63	71.9%^b	α =0.80^d†	DIB, r = 0.76^f;
					PDQ-R, r = 0.73^f

EDTP eating disorder treatment program, SATP substance abuse treatment program, UG under-graduates, MHU mental health unit, PMC primary medical care, α Coefficient Alpha, Κ Coefficient Kappa, Φ Coefficient Phi, ICC Intra Class Correlation, MHhx mental health history, SI suicide ideation, SA suicide attempt, NR not reported, MSI-BPD McLean Screening Instrument for Borderline Personality Disorder [36]; YRBS Youth Risk Behaviours Survey [37], DIB Diagnostic Interview for Borderlines [38], PDQ-R Personality Diagnostic Questionnaire Revised [39], FASM Functional Assessment of Self-Mutilation [40], BPO Borderline Personality Organization Scale [41], ^a one or more DSH behaviours in past month, ^b one or more DSH behaviours in lifetime, ^c items scored 0,1 for presence in last month, ^d items scored 0,1 for presence in lifetime, ^e dichotomous variable (lifetime presence) scored 0 (no items endorsed) and 1 (at least one item endorsed), ^f continuous variable (lifetime presence) scored as sum of 0,1 endorsements across all items, ^g continuous variable (lifetime frequency) scored as sum of frequency across all items, ^h continuous variable (frequency for each item) in last month, † [42] (107, 57% females, MHU, aged 18 to 65).

ISSN: 1471-244X