Estimated intelligence quotient in anorexia nervosa: a systematic review and meta-analysis of the literature

Table 1 Studies included in this review

Lead authors	Publication date and reference	IQ test	N	Age	BMI	IQ mean	IQ SD
NART studies:
Kingston	1996 [41]	NART	46	22.1	14.7	108.9	5.7
Mathias	1998 [32]	NART-R	34	22	15.3	96.1	8.8
Seed	2000 [42]	NART	18	27.3	15.2	111.5	9.4
Tchanturia	2004 [43]	NART-R	34	26.7	13.7	111.4	6.5
Tchanturia	2004 [37]	NART-R	34	27.2	13.7	111.1	7
Fowler	2006 [44]	NART	25	16.9	15.3	108.3	5.5
Tchanturia	2007 [36]	NART	29	28.5	15.5	115.2	5.5
Bosanac	2007 [35]	NART	16	28.9	15.2	109	8.6
Lopez	2008 [45]	NART	37	28.4	15.8	112.8	6.8
Southgate	2008 [46]	NART	20	26.8	16.3	116.8	4.8
Dickson	2008 [31]	NART	24	30.6	16	114.5	5
Tchanturia	2008 [47]	NART	27	28.8	14.3	112.7	6.5
Key	2006 [48]	NART	11	27.65	16.8	109	11.1
Thompson	1993 [49]	NART	10	25.8		115.8	NR
WAIS studies:
Pendleton-Jones	1991 [38]	WAIS	30	24.4	59% ideal	104.4	12.6
Mathias	1998 [32]	WAIS-R	34	22	15.3	97.3	16.3
Galderisi	2003 [50]	WAIS	14	Approximately 23.7	15.4	100	10.8
Holliday	2005 [51]	WAIS-R	47	26.3	17.9	111.3	7.6
Connan	2006 [52]	WAIS-R	16	25.4	16.2	117.6	16.7
Steinglass	2006 [53]	WASI	15	25.6	19	109.8	12.1
McCormick	2008 [54]	WAIS	16	Approximately 25.2	NR	96.5	12.9
Dura	1989 [10]	WAIS-R	20	14.7	NR	102.5	NR
McDowell	2003 [55]	WAIS-R	98	27.2	15.9	98.2	12.1
Grunwald	2001 [56, 57]	HAWIK	10	15.9	15.2	115.2	8
Gordon	1984 [58]	WAIS and WISC-R	10	15.7	NR	112.7	13.1
Grunwald	2002 [59]	HAWIK	16	15.3	14.8	113.5	12.4
Bayless	2002 [60]	WAIS	59	24.3	16.8	103.6	12.1
Wilbur	1981 [61]	WAIS/WISC	34	17	NR	111	NR
Ranseen	1992 [62]	WAIS-R	38	21.7	NR	99.5	16.6
Small	1982 [63]	WAIS	27	20.6	NR	108.1	10.4

BMI = Body Mass Index; HAWIK = Hamburg-Wechsler-Intelligenztest für Kinder (German version of WAIS); NART(-R) = National Adult Reading Test (Revised); NR = not reported; SD = standard deviation; WAIS(-R) = Wechsler Adult Intelligence Scale (Revised); WASI = Wechsler Abbreviated Scale of Intelligence (short form of WAIS); WISC(-R) = Wechsler Children Intelligence Scale (Revised).

ISSN: 1744-859X