User profiles for Olav Nielssen

Olav Nielssen

Macquarie University
Verified email at mq.edu.au
Cited by 10002

Royal Australian and New Zealand College of Psychiatrists clinical practice guidelines for the management of schizophrenia and related disorders

…, J Kulkarni, P McGorry, O Nielssen… - Australian & New …, 2016 - journals.sagepub.com
Objectives: This guideline provides recommendations for the clinical management of
schizophrenia and related disorders for health professionals working in Australia and New Zealand…

Cannabis use and earlier onset of psychosis: a systematic meta-analysis

…, MT Compton, T Slade, O Nielssen - Archives of general …, 2011 - jamanetwork.com
Objective: To establish the extent to which use of cannabis, alcohol, and other psychoactive
substances affects the age at onset of psychosis by meta-analysis. Data Sources: Peer-…

[HTML][HTML] Prevalence and risk factors of violence by psychiatric acute inpatients: a systematic review and meta-analysis

L Iozzino, C Ferrari, M Large, O Nielssen… - PloS one, 2015 - journals.plos.org
Background Violence in acute psychiatric wards affects the safety of other patients and the
effectiveness of treatment. However, there is a wide variation in reported rates of violence in …

Violence in first-episode psychosis: a systematic review and meta-analysis

MM Large, O Nielssen - Schizophrenia research, 2011 - Elsevier
BACKGROUND: Violence towards others is a recognised complication of first-episode
psychosis. AIMS: To estimate the rate of violence and the associations with violence in first-…

Rates of homicide during the first episode of psychosis and after treatment: a systematic review and meta-analysis

O Nielssen, M Large - Schizophrenia bulletin, 2010 - academic.oup.com
The observation that almost half of the homicides committed by people with a psychotic
illness occur before initial treatment suggests an increased risk of homicide during the first …

Systematic review and meta‐analysis of the clinical factors associated with the suicide of psychiatric in‐patients

…, G Smith, S Sharma, O Nielssen… - Acta Psychiatrica …, 2011 - Wiley Online Library
Large M, Smith G, Sharma S, Nielssen O, Singh SP. Systematic review and meta‐analysis
of the clinical factors associated with the suicide of psychiatric in‐patients. Objective: To …

Risk factors for suicide within a year of discharge from psychiatric hospital: a systematic meta-analysis

…, E Cannon, C Ryan, O Nielssen - Australian & New …, 2011 - journals.sagepub.com
Background: The increased risk of suicide in the period after discharge from a psychiatric
hospital is a well-recognized and serious problem. Objective: The aim of this study was to …

[HTML][HTML] Psychometric properties and clinical utility of brief measures of depression, anxiety, and general distress: The PHQ-2, GAD-2, and K-6

…, V Fogliati, R Fogliati, E Karin, O Nielssen… - General hospital …, 2019 - Elsevier
Objective The nine-item Patient Health Questionnaire (PHQ-9), seven-item Generalized
Anxiety Disorder scale (GAD-7), and ten-item Kessler Psychological Distress Scale (K-10) are …

[HTML][HTML] ICBT in routine care: a descriptive analysis of successful clinics in five countries

N Titov, B Dear, O Nielssen, L Staples… - Internet …, 2018 - Elsevier
Clinical trials have demonstrated the efficacy of internet delivered cognitive behaviour therapy
(ICBT) for anxiety and depression. However, relatively little is known about the context, …

The relationship between the duration of untreated psychosis and outcome in low-and-middle income countries: a systematic review and meta analysis

S Farooq, M Large, O Nielssen, W Waheed - Schizophrenia research, 2009 - Elsevier
BACKGROUND: The duration of untreated psychosis (DUP) is defined as the period between
the onset of symptoms of psychosis and the start of antipsychotic treatment. Delay in the …