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Research Output

2014

A population-based study of genetic variation and psychotic experiences in adolescents

Zammit, S., Hamshere, M., Dwyer, S., Georgiva, L., Timpson, N., Moskvina, V., Richards, A., Evans, D. M., Lewis, G., Jones, P., Owen, M. J. & O'Donovan, M. C., 1 Nov 2014, In : Schizophrenia Bulletin. 40, 6, p. 1254-1262 9 p.

Research output: Contribution to journalArticle (Academic Journal)

Open Access
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45 Citations (Scopus)
184 Downloads (Pure)

Association of serum interleukin 6 and C-reactive protein in childhood with depression and psychosis in young adult life: a population-based longitudinal study

Khandaker, G. M., Pearson, R. M., Zammit, S., Lewis, G. & Jones, P. B., 1 Oct 2014, In : JAMA Psychiatry. 71, 10, p. 1121-1128 8 p.

Research output: Contribution to journalArticle (Academic Journal)

266 Citations (Scopus)

Associations of cannabis and cigarette use with psychotic experiences at age 18: findings from the Avon Longitudinal Study of Parents and Children

Gage, S. H., Hickman, M., Heron, J., Munafo, M. R., Lewis, G., Macleod, J. & Zammit, S., 6 Dec 2014, In : Psychological Medicine. 44, 16, p. 3435-3444 10 p.

Research output: Contribution to journalArticle (Academic Journal)

44 Citations (Scopus)

Childhood Epstein-Barr Virus infection and subsequent risk of psychotic experiences in adolescence: A population-based prospective serological study

Khandaker, G. M., Stochl, J., Zammit, S., Lewis, G. & Jones, P. B., 1 Sep 2014, In : Schizophrenia Research. 158, 1-3, p. 19-24 6 p.

Research output: Contribution to journalArticle (Academic Journal)

38 Citations (Scopus)

Childhood parasomnias and psychotic experiences at age 12 years in a United Kingdom birth cohort

Fisher, H. L., Lereya, S. T., Thompson, A., Lewis, G., Zammit, S. & Wolke, D., 1 Mar 2014, In : Sleep. 37, 3, p. 475-482 8 p.

Research output: Contribution to journalArticle (Academic Journal)

38 Citations (Scopus)

Commentary: Response to commentary by Rutter on Munafo et al. (2014)

Munafò, M. R., Zammit, S. & Flint, J., 6 Aug 2014, In : Journal of Child Psychology and Psychiatry. 55, 10, p. 1105-1106 2 p.

Research output: Contribution to journalArticle (Academic Journal)

2 Citations (Scopus)

Common versus psychopathology-specific risk factors for psychotic experiences and depression during adolescence

Kounali, D., Zammit, S., Wiles, N., Sullivan, S., Cannon, M., Stochl, J., Jones, P., Mahedy, L., Gage, S. H., Heron, J. & Lewis, G., 1 Sep 2014, In : Psychological Medicine. 44, 12, p. 2557-2566 10 p.

Research output: Contribution to journalArticle (Academic Journal)

25 Citations (Scopus)

Exploring the indirect effects of catechol-O-methyltransferase (COMT) genotype on psychotic experiences through cognitive function and anxiety disorders in a large birth cohort of children

Niarchou, M., Zammit, S., Escott-Price, V., Owen, M. J. & Bree, M. B. V. D., 1 Jul 2014, In : American Journal of Medical Genetics, Part B: Neuropsychiatric Genetics. 165, 5, p. 410-420 11 p.

Research output: Contribution to journalArticle (Academic Journal)

1 Citation (Scopus)

Individual- and area-level influence on suicide risk: A multilevel longitudinal study of Swedish schoolchildren

Zammit, S., Gunnell, D., Lewis, G., Leckie, G., Dalman, C. & Allebeck, P., 1 Jan 2014, In : Psychological Medicine. 44, 2, p. 267-277 11 p.

Research output: Contribution to journalArticle (Academic Journal)

7 Citations (Scopus)
22 Downloads (Pure)

Longitudinal associations between adolescent psychotic experiences and depressive symptoms

Sullivan, S. A., Wiles, N. J., Kounali, D-Z., Lewis, G., Heron, J. E., Cannon, M., Mahedy, L., Jones, P., Stochl, J. & Zammit, S., 27 Aug 2014, In : PLoS ONE. 9, 8, e105758.

Research output: Contribution to journalArticle (Academic Journal)

Open Access
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23 Citations (Scopus)
178 Downloads (Pure)

Perinatal maternal life events and psychotic experiences in children at twelve years in a birth cohort study

Dorrington, S., Zammit, S., Asher, L., Evans, J., Heron, J. E. & Lewis, G., Jan 2014, In : Schizophrenia Research. 152, 1, p. 158-163 6 p.

Research output: Contribution to journalArticle (Academic Journal)

27 Citations (Scopus)
24 Citations (Scopus)

Prognosis of schizophrenia in persons with and without a history of cannabis use

Manrique-Garcia, E., Zammit, S., Dalman, C., Hemmingsson, T., Andreasson, S. & Allebeck, P., 1 Sep 2014, In : Psychological Medicine. 44, 12, p. 2513-2521 9 p.

Research output: Contribution to journalArticle (Academic Journal)

36 Citations (Scopus)

Psychopathology and cognition in children with 22q11.2 deletion syndrome

Niarchou, M., Zammit, S., Goozen, S. H. M. V., Thapar, A., Tierling, H., Owen, M. J. & Bree, M. B. V. D., 1 Jan 2014, In : British Journal of Psychiatry. 204, 1, p. 46-54 9 p.

Research output: Contribution to journalArticle (Academic Journal)

Open Access
File
37 Citations (Scopus)
194 Downloads (Pure)

Validation of a composite of suicide items from the Mood and Feelings Questionnaire (MFQ) in offspring of recurrently depressed parents

Hammerton, G., Zammit, S., Potter, R., Thapar, A. & Collishaw, S., 30 Apr 2014, In : Psychiatry Research. 216, 1, p. 82-8 7 p.

Research output: Contribution to journalArticle (Academic Journal)

8 Citations (Scopus)
2013
17 Citations (Scopus)

Are parental ADHD problems associated with a more severe clinical presentation and greater family adversity in children with ADHD?

Agha, S. S., Zammit, S., Thapar, A. & Langley, K., Jun 2013, In : European Child and Adolescent Psychiatry. 22, 6, p. 369-377 9 p.

Research output: Contribution to journalArticle (Academic Journal)

40 Citations (Scopus)

Bullying in elementary school and psychotic experiences at 18 years: a longitudinal, population-based cohort study

Wolke, D., Lereya, S. T., Fisher, H. L., Lewis, G. H. & Zammit, S., 1 Dec 2013, In : Psychological Medicine. 44, 10, p. 2199 1 p.

Research output: Contribution to journalArticle (Academic Journal)

79 Citations (Scopus)

Child literacy and psychotic experiences in early adolescence: Findings from the ALSPAC study

Hameed, M. A., Lewis, A., Sullivan, S. A. & Zammit, S., 2013, In : Schizophrenia Research. 145, p. 88-94

Research output: Contribution to journalArticle (Academic Journal)

9 Citations (Scopus)

Cognitive styles and psychotic experiences in a community sample

Sullivan, S. A., Bentall, R., Fernyhough, C., Pearson, R. M. & Zammit, S., 5 Jul 2013, In : PLoS ONE. 8, 11, e80055.

Research output: Contribution to journalArticle (Academic Journal)

4 Citations (Scopus)

Commentary on Griffith-Lendering et al. (2013): Cross-lagging cannabis and psychosis vulnerability

Lewis, G., Heron, J. & Zammit, S., 1 Apr 2013, In : Addiction. 108, 4, p. 741-742 2 p.

Research output: Contribution to journalEditorial (Academic Journal)

Defective processing speed and nonclinical psychotic experiences in children: longitudinal analyses in a large birth cohort

Niarchou, M., Zammit, S., Walters, J. T. R., Lewis, G., Owen, M. J. & Bree, M. B. V. D., 1 May 2013, In : American Journal of Psychiatry. 170, 5, p. 550-557 8 p.

Research output: Contribution to journalArticle (Academic Journal)

31 Citations (Scopus)

Genetic relationship between five psychiatric disorders estimated from genome-wide SNPs

Hamshere, M. L., Zammit, S. & Cross-Disorder Group of the Psychiatric Genomics Consortium, Sep 2013, In : Nature Genetics. 45, 9, p. 984-994 11 p.

Research output: Contribution to journalArticle (Academic Journal)

1212 Citations (Scopus)

Genetic schizophrenia risk variants jointly modulate total brain and white matter volume

Scheltinga, A. F. T. V., Bakker, S. C., Haren, N. E. M. V., Derks, E. M., Buizer-Voskamp, J. E., Boos, H. B. M., Cahn, W., Pol, H. E. H., Ripke, S., Ophoff, R. A., Kahn, R. S., Craddock, N. J., Dwyer, S., Escott-Price, V., Georgieva, L., Hamshere, M. L., Holmans, P. A., Kirov, G., O'Donovan, M. C., Owen, M. J. & 3 others, Ruderfer, D., Williams, N. M. & Zammit, S., 1 Mar 2013, In : Biological Psychiatry. 73, 6, p. 525-531 7 p.

Research output: Contribution to journalArticle (Academic Journal)

69 Citations (Scopus)

Pathways between childhood victimization and psychosis-like symptoms in the ALSPAC birth cohort

Fisher, H. L., Schreier, A., Zammit, S., Maughan, B., Munafo, M. R., Lewis, G. H. & Wolke, D., 1 Sep 2013, In : Schizophrenia Bulletin. 39, 5, p. 1045-1055 11 p.

Research output: Contribution to journalArticle (Academic Journal)

101 Citations (Scopus)

Prenatal vitamin D status and risk of psychotic experiences at age 18years - a longitudinal birth cohort

Sullivan, S., Wills, A., Lawlor, D., McGrath, J. & Zammit, S., 1 Aug 2013, In : Schizophrenia Research. 148, 1-3, p. 87-92 6 p.

Research output: Contribution to journalArticle (Academic Journal)

19 Citations (Scopus)

Psychotic experiences and psychotic disorders at age 18 in relation to psychotic experiences at age 12 in a longitudinal population-based cohort study

Zammit, S., Kounali, D-Z., Cannon, M., David, A. S., Gunnell, D., Heron, J. E., Jones, P. B. T., Lewis, S., Sullivan, S. A., Wolke, D. F. H. & Lewis, G. H., Jul 2013, In : American Journal of Psychiatry. 170, 7, p. 742-750 9 p.

Research output: Contribution to journalArticle (Academic Journal)

159 Citations (Scopus)

Schizophrenia genetic variants are not associated with intelligence

Scheltinga, A. F. T. V., Bakker, S. C., Haren, N. E. M. V., Derks, E. M., Buizer-Voskamp, J. E., Cahn, W., Ripke, S., Ophoff, R. A., Kahn, R. S., Craddock, N. J., Escott-Price, V., Georgieva, L., Hamshere, M. L., Holmans, P. A., Kirov, G., O'Donovan, M. C., Owen, M. J., Ruderfer, D., Williams, H., Williams, N. M. & 1 others, Zammit, S., 1 Dec 2013, In : Psychological Medicine. 43, 12, p. 2563-2570 8 p.

Research output: Contribution to journalArticle (Academic Journal)

27 Citations (Scopus)
23 Citations (Scopus)
45 Citations (Scopus)

The relationship between psychotic symptoms and social functioning in a non-clinical population of 12 year olds

Asher, L. L., Zammit, S., Sullivan, S. A., Dorrington, S., Heron, J. E. & Lewis, G. H., 1 Nov 2013, In : Schizophrenia Research. 150, 2-3, p. 404-409 6 p.

Research output: Contribution to journalSpecial issue (Academic Journal)

13 Citations (Scopus)

USING MENDELIAN RANDOMISATION TO INFER CAUSALITY IN DEPRESSION AND ANXIETY RESEARCH

Gage, S. H., Smith, G. D., Zammit, S., Hickman, M. & Munafò, M. R., 11 Jul 2013, In : Depression and Anxiety. 30, 12, p. 1185-1193 9 p.

Research output: Contribution to journalArticle (Academic Journal)

20 Citations (Scopus)
2012

A population-based study of shared genetic variation between premorbid IQ and psychosis among male twin pairs and sibling pairs from Sweden

Fowler, T., Zammit, S., Owen, M. J. & Rasmussen, F., 1 May 2012, In : Archives of General Psychiatry. 69, 5, p. 460-466 7 p.

Research output: Contribution to journalArticle (Academic Journal)

40 Citations (Scopus)

Authors' reply

Zammit, S., Gunawardana, L., Smith, G. D., Whitley, E., Gunnell, D., Lewis, S. & Rasmussen, F., Feb 2012, In : British Journal of Psychiatry. 200, 2, p. 160-161 2 p.

Research output: Contribution to journalArticle (Academic Journal)

Cannabis, schizophrenia and other non-affective psychoses: 35 years of follow-up of a population-based cohort

Manrique-Garcia, E., Zammit, S., Dalman, C., Hemmingsson, T., Andreasson, S. & Allebeck, P., 1 Jun 2012, In : Psychological Medicine. 42, 6, p. 1321-1328 8 p.

Research output: Contribution to journalArticle (Academic Journal)

79 Citations (Scopus)

Cannabis use and depression: a longitudinal study of a national cohort of Swedish conscripts

Manrique-Garcia, E., Zammit, S., Dalman, C., Hemmingsson, T. & Allebeck, P., 16 Aug 2012, In : BMC Psychiatry. 12, 1, p. 112 1 p.

Research output: Contribution to journalArticle (Academic Journal)

Open Access
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35 Citations (Scopus)
189 Downloads (Pure)

Investigation of the genetic association between quantitative measures of psychosis and schizophrenia: A polygenic risk score analysis

Derks, E. M., Vorstman, J. A. S., Ripke, S., Kahn, R. S., Ophoff, R. A., Craddock, N. J., Escott-Price, V., Hamshere, M. L., Holmans, P. A., Kirov, G., O'Donovan, M. C., Owen, M. J. & Zammit, S., 22 Jun 2012, In : PLoS ONE. 7, 6, e37852.

Research output: Contribution to journalArticle (Academic Journal)

Open Access
File
46 Citations (Scopus)
208 Downloads (Pure)

Runs of homozygosity implicate autozygosity as a schizophrenia risk factor

Keller, M. C., Simonson, M. A., Ripke, S., Neale, B. M., Gejman, P. V., Howrigan, D. P., Lee, S. H., Lencz, T., Levinson, D. F., Sullivan, P. F., Kirov, G., O'Donovan, M. C., Holmans, P. A., Georgieva, L., Nikolov, I., Williams, H. J., Owen, M. J., Craddock, N. J., Hamshere, M. L., Escott-Price, V. & 2 others, Dwyer, S. L. & Zammit, S., 1 Apr 2012, In : PLoS Genetics. 8, 4, 11 p.

Research output: Contribution to journalArticle (Academic Journal)

Open Access
File
69 Citations (Scopus)
156 Downloads (Pure)

Serum 25-hydroxyvitamin D3 and D2 and non-clinical psychotic experiences in childhood

Tolppanen, A-M., Sayers, A. E., Fraser, W. D., Lewis, G. H., Zammit, S., McGrath, J. & Lawlor, D. A., 25 Jul 2012, In : PLoS ONE. 7, 7, 8 p., e41575.

Research output: Contribution to journalArticle (Academic Journal)

Open Access
File
21 Citations (Scopus)
132 Downloads (Pure)

The association between early autistic traits and psychotic experiences in adolescence

Bevan Jones, R., Thapar, A., Lewis, G. & Zammit, S., Mar 2012, In : Schizophrenia Research. 135, 1-3, p. 164-169 6 p.

Research output: Contribution to journalArticle (Academic Journal)

54 Citations (Scopus)

The association of 25-hydroxyvitamin D3 and D2 with behavioural problems in childhood

Tolppanen, A-M., Sayers, A. E., Fraser, W. D., Lewis, G. H., Zammit, S. & Lawlor, D. A., 10 Jul 2012, In : PLoS ONE. 7, 7, 8 p., e40097.

Research output: Contribution to journalArticle (Academic Journal)

Open Access
File
25 Citations (Scopus)
201 Downloads (Pure)

The association of serum 25-hydroxyvitamin D3 and D2 with depressive symptoms in childhood: a prospective cohort study

Tolppanen, A-M., Sayers, A. E., Fraser, W. D., Lewis, G. H., Zammit, S. & Lawlor, D. A., Jul 2012, In : Journal of Child Psychology and Psychiatry. 53, 7, p. 757-766 10 p.

Research output: Contribution to journalArticle (Academic Journal)

Open Access
File
38 Citations (Scopus)
242 Downloads (Pure)

Trajectories of change in self-reported psychotic-like experiences in childhood and adolescence

Thapar, A., Heron, J. E., Bevan Jones, R., Owen, M. J., Lewis, G. H. & Zammit, S., 1 Sep 2012, In : Schizophrenia Research. 140, 1-3, p. 104-109 6 p.

Research output: Contribution to journalArticle (Academic Journal)

20 Citations (Scopus)
2011

Age- and puberty-dependent association between IQ score in early childhood and depressive symptoms in adolescence

Glaser, B., Gunnell, D., Timpson, N. J., Joinson, C., Zammit, S., Smith, G. D. & Lewis, G. H., 1 Feb 2011, In : Psychological Medicine. 41, 02, p. 333-343 11 p.

Research output: Contribution to journalArticle (Academic Journal)

Open Access
File
15 Citations (Scopus)
185 Downloads (Pure)

Association between locus of control in childhood and psychotic symptoms in early adolescence: Results from a large birth cohort

Thompson, A., Sullivan, S., Lewis, G., Zammit, S., Heron, J., Horwood, J., Thomas, K., Gunnell, D., Hollis, C., Wolke, D. & Harrison, G., Sep 2011, In : Cognitive Neuropsychiatry. 16, 5, p. 385-402 18 p.

Research output: Contribution to journalArticle (Academic Journal)

25 Citations (Scopus)

Cannabis, COMT and psychotic experiences

Zammit, S., Owen, M. J., Evans, J., Heron, J. & Lewis, G., Nov 2011, In : British Journal of Psychiatry. 199, 5, p. 380-385 6 p.

Research output: Contribution to journalArticle (Academic Journal)

85 Citations (Scopus)

Childhood facial emotion recognition and psychosis-like symptoms in a non-clinical population at 12 years of age: results from the ALSPAC birth cohort

Thompson, A., Sullivan, S., Heron, J., Thomas, K., Zammit, S., Horwood, J., Gunnell, D., Hollis, C., Lewis, G., Wolke, D. & Harrison, G., 1 Mar 2011, In : Cognitive Neuropsychiatry. 16, 2, p. 136 - 157 22 p.

Research output: Contribution to journalArticle (Academic Journal)

11 Citations (Scopus)

Does cannabis use cause schizophrenia? The epidemiological evidence

Zammit, S., Arseneault, L., Cannon, M. & Murray, R. M., 1 Jan 2011, Marijuana and Madness: Second Edition. Cambridge University Press, p. 169-183 15 p.

Research output: Chapter in Book/Report/Conference proceedingChapter in a book

1 Citation (Scopus)

Examining the association between maternal analgesic use during pregnancy and risk of psychotic symptoms during adolescence

Gunawardana, L., Zammit, S., Lewis, G., Gunnell, D., Hollis, C., Wolke, D. & Harrison, G., 2011, In : Schizophrenia Research. 126, 1-3, p. 220-5 6 p.

Research output: Contribution to journalArticle (Academic Journal)

15 Citations (Scopus)