Sci K
Sci K
Abstract
Kleptomania presents difficulties in diagnosis for clinicians. This study aimed to develop and test a DSM-IV-based diag-
nostic instrument for kleptomania. To assess for current kleptomania the Structured Clinical Interview for Kleptomania
(SCI-K) was administered to 112 consecutive subjects requesting psychiatric outpatient treatment for a variety of disorders.
Reliability and validity were determined. Classification accuracy was examined using the longitudinal course of illness.
The SCI-K demonstrated excellent test-retest (Phi coefficient = 0.956 (95% CI = 0.937, 0.970)) and inter-rater reliability
(phi coefficient = 0.718 (95% CI = 0.506, 0.848)) in the diagnosis of kleptomania. Concurrent validity was observed
with a self-report measure using DSM-IV kleptomania criteria (phi coefficient = 0.769 (95% CI = 0.653, 0.850)). Dis-
criminant validity was observed with a measure of depression (point biserial coefficient = -0.020 (95% CI = -0.205,
0.166)). The SCI-K demonstrated both high sensitivity and specificity based on longitudinal assessment. The SCI-K
demonstrated excellent reliability and validity in diagnosing kleptomania in subjects presenting with various psychiatric
problems. These findings require replication in larger groups, including non-psychiatric populations, to examine their
generalizability. Copyright © 2006 John Wiley & Sons, Ltd.
*None of the authors have any employment, consultancy, ownership in, or any close relationship with any organization whose inter-
ests, financial or otherwise may be affected by the publication of this paper. All authors have contributed to the conception and
design, analysis and interpretation of data, drafting the article and revising it critically for important intellectual content and final
approval of this version.
The prevalence of kleptomania remains unknown, but • the Structured Clinical Interview for Kleptomania
a recent study of psychiatric inpatients with multiple (SCI-K) (appendix);
disorders revealed that kleptomania may in fact be • the Hamilton Rating Scale for Depression (HAM-D
fairly common. The study of 204 adult psychiatric 17-item version) (Hamilton, 1960); and
inpatients in the US found that 7.8% (n = 16) endorsed • a thorough clinical interview using DSM-IV criteria
current symptoms consistent with a diagnosis of klep- and assessing for primary Axis I disorders as well as
tomania and 9.3% (n = 19) had a lifetime diagnosis borderline personality disorder and antisocial per-
of kleptomania (Grant et al., 2005). In addition, sonality disorder.
kleptomania appeared equally common in patients
with mood, anxiety, substance-use, or psychotic disor- A random subset of the subjects (n = 71) was adminis-
ders. These findings are further supported by two tered a self-report version of the DSM-IV inclusion
French studies that found current rates of 3.7% among criteria for kleptomania at entry and at the second visit.
107 inpatients with depression (Lejoyeux et al., 2002) The institutional review board of the two hospitals
and 3.8% in 79 inpatients with alcohol dependence approved the study. After a complete description of the
(Lejoyeux et al., 1999). These studies suggest that study, all subjects provided written informed consent.
kleptomania may be fairly common; however, the The SCI-K consists of nine probe and additional
shame and embarrassment associated with stealing may follow-up questions (five probes for inclusionary criteria
prevent a large number of people from voluntarily and four for exclusionary criteria) reflecting DSM-IV
reporting kleptomania symptoms (Grant and Kim, criteria. A diagnosis of kleptomania is made if all five
2002). inclusionary questions and the four exclusionary items
Although kleptomania is associated with impaired (not due to anger/vengeance, psychosis, mania, or anti-
functioning and poor quality of life (Grant and Kim, social personality disorder) are answered affirmatively.
2005) there is some indication that both clinicians and Therefore, once a subject answered ‘no’ to any question
researchers fail to screen for or diagnose the disorder in the SCI-K, the interview was ended as the diagnosis
(Goldman, 1991). This failure to diagnose kleptomania requires affirmative answers to all questions. In the case
may stem in part from the lack of a DSM-IV-based of inter-rater reliability, subjects were asked all ques-
diagnostic instrument for kleptomania. In addition, tions regardless of the answers. For the diagnostic cri-
kleptomania presents many difficult considerations teria of ‘recurrent impulses’, subjects were asked if they
concerning differential diagnosis (Grant and Kim, had ‘urges’, ‘cravings’, or ‘drive’ to steal. These terms
2002) and therefore a structured interview may opti- were not operationalized. Subjects met the threshold
mize accurate assessment of kleptomania behaviour. for this criterion only if there was an obvious craving
The Structured Clinical Interview for DSM-IV (SCID) or urge state associated with their stealing based on
(First et al., 1995), a widely used diagnostic instrument, clinician judgement. Subjects were administered the
currently lacks a module for kleptomania. SCI-K prior to the other measures. The self-report
version listed DSM-IV kleptomania criteria A, B, and
Aims of the Study C verbatim and without elaboration. Subjects were
The goal of this study was to develop a SCID-compat- asked to answer ‘yes’ or ‘no’ as to whether each criterion
ible, DSM-IV-based instrument for kleptomania and described their behaviour.
examine validity and reliability in subjects presenting Test-retest reliability was assessed in 112 subjects
with various psychiatric disorders. (Table 1). Test-retest reliability was performed at two
consecutive time points (mean (SD) = 17.8 (20.9) days).
Material and methods Inter-rater reliability was assessed in a random group of
The following were administered to 112 consecutive 35 subjects (Table 1). Ratings were based on a single
subjects (Table 1) seeking either pharmacotherapy or interview with one clinician administering the SCI-K
psychotherapy treatment in an outpatient psychiatric and another observing and rating the subject.
clinic at a public university academic centre (n = 29) Scale item internal consistency was calculated using
or at a specialty clinic for impulse control disorders at Cronbach’s alpha. To assess inter-rater and test-retest
a private psychiatric hospital (n = 83), at entry into the reliability of the scale’s diagnosis of kleptomania (klep-
study and at the next follow-up visit: tomania versus non-kleptomania), we calculated phi
Age
Mean (±SD) years 39.7 (11.9) 36.9 (9.3) 37.8 (10.4) 37.2 (6.6)
Gender: n (%)
Male 44 (39.3) 12 (34.3) 27 (38.0) 22 (47.8)
Female 68 (60.7) 23 (65.7) 44 (62.0) 24 (52.2)
Marital status: n (%)
Single 55 (49.2) 16 (45.7) 30 (42.3) 19 (41.3)
Married 28 (25.0) 8 (22.9) 18 (25.4) 16 (34.8)
Divorced/separated/widowed 29 (25.9) 11 (31.4) 23 (32.4) 11 (23.9)
Race
White 97 (86.6) 32 (91.4) 61 (85.9) 44 (95.7)
Black 11 (9.8) 3 (8.6) 8 (11.3) 2 (4.3)
Latino 2 (1.8) 0 (0) 1 (1.4) 0 (0)
Asian 1 (0.9) 0 (0) 0 (0) 0 (0)
Native American 1 (0.9) 0 (0) 1 (0.4) 0 (0)
Education
Less than high school 20 (17.9) 2 (5.7) 7 (9.9) 1 (2.2)
High school graduate 60 (53.6) 24 (68.6) 48 (67.6) 31 (67.4)
Some college 21 (18.8) 6 (17.1) 11 (15.5) 9 (19.6)
College graduate 8 (7.1) 2 (5.7) 3 (4.2) 5 (10.9)
College + 3 (2.7) 1 (2.9) 2 (2.8) 0 (0)
coefficients using the Pearson product moment correla- kleptomania. Neither the wording nor the concepts
tion formula. For individual item correlations we deter- were difficult for the subjects to understand.
mined kappa coefficients for inter-rater reliabilities.
Concurrent validity was measured using phi coeffi- Reliability
cients (using the Pearson product moment correlation The internal consistency of the nine items (Cronbach’s
formula) with the self-report measure of DSM-IV Alpha = 0.964 (95% CI = 0.953, 0.973)), the five-item
criteria. Discriminant validity was assessed against the inclusionary criteria domain (Cronbach’s Alpha = 0.932
HAM-D using point biserial coefficients. (95% CI = 0.910, 0.950)), and the four-item exclusionary
Classification accuracy was assessed by examining domain (Cronbach’s Alpha = 0.979 (95% CI = 0.972,
sensitivity, specificity, and positive and negative predic- 0.985)) were examined.
tive values based on longitudinal courses of a random Test-retest reliability (phi coefficient = 0.956 (95% CI
sample of 46 subjects who continued to seek treatment = 0.937, 0.970)) was determined for the diagnosis of klep-
from the first author in his specialty clinic for impulse tomania versus non-kleptomania using the nine-item
control disorders (Table 1). The longitudinal assess- SCI-K. The removal of criterion A3 (‘stealing items not
ment was based on clinical judgement using DSM-IV needed for their personal use or monetary value’) resulted
criteria. Mean duration of treatment for the 46 subjects in a perfect correlation (phi coefficient = 1.00).
was 212.4 (SD = 43.9) days. Inter-rater reliability for the determination of klep-
tomania versus non-kleptomania using the nine-item
Results SCI-K was good (phi coefficient = 0.718 (95% CI =
0.506, 0.848)) and it also improved with the removal of
Acceptability criterion A3 (phi coefficient = 1.00). Inter-rater reliabil-
The SCI-K took an average of 20 minutes to administer ity for the individual items of the SCI-K are presented
and was well accepted by subjects with and without in Table 2.
Kappa 95% CI
relationship of stealing behaviour and mood are there- require replication in larger, more varied psychiatric
fore needed. populations to examine their generalizability. The
One item on the SCI-K (stealing items not needed evaluation of the psychometric properties of the
for personal use or their monetary value) resulted SCI-K employed in general population samples would
in lower test-retest and inter-rater reliability for also be of particular interest, and would further sub-
the diagnosis of kleptomania. This criterion has stantiate the use of the SCI-K in conjunction with the
generated controversy in diagnosing kleptomania SCID.
(Goldman, 1991). If a subject has recurrent, uncontrol-
lable impulses to steal, should the subject’s need for References
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NOTES
IF ANSWER IS ‘YES’, CONTINUE:
Do you have urges or temptations to steal even when you don’t steal?
Do you generally feel unable to stop yourself from stealing when you
have the temptation, urge or drive to steal?
Criteria A3.
Do you sometimes steal items that seem silly or nonsensical to you to steal?
Do you ever steal the same items, or types of items, over and over again?
Criteria B.
Does the feeling you have before stealing go away if you steal?
Criteria C.
Criteria D1.
Have you ever stolen when you were feeling angry? The stealing is not committed to
express anger or vengeance
or, 1
were you trying to ‘get even’ for yourself or
someone close to you? 2
or,
did you feel you deserved what you stole because the store has so
much money and you don’t?
or,
were you stealing for a social or political reason
aimed against that particular store?
IF YES,
Is this the reason (USE SUBJECT’S REASON) that you usually steal?
Criteria D2.
IF YES,
Is this the reason (USE SUBJECT’S REASON) that you usually steal?
EXCLUSION CRITERIA:
TO MEET DIAGNOSTIC CRITERIA FOR KLEPTOMANIA, THE SUBJECT MUST MEET THRESHOLD FOR
ALL CRITERIA AND MUST NOT MEET EXCLUSION CRITERIA.
Present Absent
Correspondence: Jon E. Grant, Department of Psychiatry, University of Minnesota, 2450 Riverside Avenue, Minneapolis,
MN 55454, USA.
Telephone: (+1) 612-273-9736
Fax: 612-273-9779
Email: grant045@umn.edu