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Objective: To estimate the lifetime prevalence and projected lifetime risk at age 75 years of DSM-IV disorders in New Zealand. Method: A nationwide face-to-face household survey carried out in 2003–2004. A fully structured diagnostic interview, the World Health Organization Composite International Diagnostic Interview (CIDI 3.0), was used. There were 12 992 completed interviews from participants aged 16 years and over. The overall response rate was 73.3%. In this paper, the outcomes reported are lifetime prevalence and projected lifetime risk at age 75 years. Results: The lifetime prevalence of any disorder was 39.5%. The lifetime prevalences for disorder groups were: anxiety disorders, 24.9%; mood disorders, 20.2%; substance use disorders, 12.3%; and eating disorders, 1.7%. The prevalences for all disorders were higher in the younger age groups. Females had higher prevalences of anxiety, mood and eating disorders compared with males; males had higher prevalences of substance use disorders. The estimated projected lifetime risk of any disorder at age 75 years was 46.6% with the median age of onset being 18 years. Adjustment for age, sex, education and household income did not remove all differences between Māori and the composite other ethnic group in the risk of disorder (hazard ratio = 1.1–1.4). After adjustment, hazard ratios for Pacific people ranged from 0.8 to 2.5. Conclusions: These results confirm those of other studies: mental disorders are relatively common and tend to have early onset. Females are more likely to experience anxiety, mood and eating disorders than males, who experience more substance use disorders. Adjustment for socioeconomic factors and demography does not explain all ethnic differences, although remaining differences are small relative to cohort and even sex differences. [ABSTRACT FROM AUTHOR]

Objective: To estimate the 12 month and lifetime use of health services for mental health problems. Method: A nationwide face-to-face household survey carried out in 2003–2004. A fully structured diagnostic interview, the World Health Organization Composite International Diagnostic Interview (CIDI 3.0) was used. There were 12 992 completed interviews from participants aged 16 years and over. The overall response rate was 73.3%. In this paper, the outcomes reported are 12 month and lifetime health service use for mental health and substance use problems. Results: Of the population, 13.4% had a visit for a mental health reason in the 12 months before interview. Of all 12 month cases of mental disorder, 38.9% had a mental health visit to a health or non-health-care provider in the past 12 months. Of these 12 month cases, 16.4% had contact with a mental health specialist, 28.3% with a general medical provider, 4.8% within the human services sector and 6.9% with a complementary or alternative medicine practitioner. Most people with lifetime disorders eventually made contact if their disorder continued. However, the percentages seeking help at the age of onset were small for most disorders and several disorders had large percentages who never sought help. The median duration of delay until contact varies from 1 year for major depressive disorder to 38 years for specific phobias. Conclusions: A significant unmet need for treatment for people with mental disorder exists in the New Zealand community, as in other comparable countries. [ABSTRACT FROM AUTHOR]

Objective: To estimate the prevalence of chronic physical conditions, and the risk factors for those conditions, among those with 12 month mental disorder; to estimate the prevalence of 12 month mental disorder among those with chronic physical conditions. Method: A nationally representative face-to-face household survey was carried out in October 2003 to December 2004 with 12 992 participants aged 16 years and over, achieving a response rate of 73.3%. Mental disorders were measured with the World Mental Health version of the Composite International Diagnostic Interview (CIDI 3.0). Physical conditions were self-reported. All associations are reported adjusted for age and sex. Results: People with (any) mental disorder, relative to those without mental disorder, had higher prevalences of several chronic physical conditions (chronic pain, cardiovascular disease, high blood pressure and respiratory conditions) and chronic condition risk factors (smoking, overweight/obesity, hazardous alcohol use). Around a quarter of people with chronic physical conditions had a comorbid mental disorder compared with 15% of the population without chronic conditions. Significant relationships occurred between some mental disorders and obesity, cardiovascular disease and diabetes for females, but not for males. Conclusions: This paper provides evidence of substantial comorbidity between mental disorders and chronic physical conditions in New Zealand. This should be borne in mind by clinicians working in both mental health and medical services. [ABSTRACT FROM AUTHOR]

Objective: To estimate the 12 month prevalence of DSM-IV disorders in New Zealand, and associated interference with life and severity. Method: A nationally representative face-to-face household survey carried out in 2003–2004. A fully structured diagnostic interview, the World Health Organization World Mental Health Survey Initiative version of the Composite International Diagnostic Interview (CIDI 3.0) was used. There were 12 992 completed interviews from participants aged 16 years and over. The overall response rate was 73.3%. In this paper the outcomes reported are 12 month prevalence, interference with life and severity for individual disorders. Results: The prevalence of any disorder in the past 12 months was 20.7%. The prevalences for disorder groups were: anxiety disorders 14.8%, mood disorders 7.9%, substance use disorders 3.5%, eating disorders 0.5%. The highest prevalences for individual disorders were for specific phobia (7.3%), major depressive disorder (5.7%) and social phobia (5.1%). Interference with life was higher for mood disorders than for anxiety disorders. Drug dependence, bipolar disorder and dysthymia had the highest proportion of severe cases (over 50%), when severity was assessed over the disorder itself and all comorbid disorders. Overall, only 31.7% of cases were classified as mild with 45.6% moderate and 22.7% serious. Conclusions: Compared with other World Mental Health survey sites New Zealand has relatively high prevalences, although almost always a little lower than for the US. For all disorders, except specific phobia, interference with life was reported to be moderate, on average, which has lead to less than a third of cases being classified as mild. Most people who have ever met full DSM-IV criteria, including the impairment criterion, and who experience symptoms or an episode in the past 12 months find that their disorders impact on their lives to a non-trivial extent. [ABSTRACT FROM AUTHOR]

Objective: To describe the prevalence of mental disorders (period prevalence across aggregated disorders, 12 month and lifetime prevalence) among Māori in Te Rau Hinengaro: The New Zealand Mental Health Survey. Method: Te Rau Hinengaro: The New Zealand Mental Health Survey, undertaken between 2003 and 2004, was a nationally representative face-to-face household survey of 12 992 New Zealand adults aged 16 years and over, including 2595 Māori. Ethnicity was measured using the 2001 New Zealand census ethnicity question. A fully structured diagnostic interview, the World Health Organization World Mental Health Survey Initiative version of the Composite International Diagnostic Interview (CIDI 3.0), was used to measure disorder. The overall response rate was 73.3%. This paper presents selected findings for the level and pattern of mental disorder prevalence among Māori. Results: Māori lifetime prevalence of any disorder was 50.7%, 12 month prevalence 29.5% and 1 month prevalence 18.3%. The most common 12 month disorders were anxiety (19.4%), mood (11.4%) and substance (8.6%) disorders and the most common lifetime disorders were anxiety (31.3%), substance (26.5%) and mood (24.3%) disorders. Levels of lifetime comorbidity were high with 12 month prevalence showing 16.4% of Māori with one disorder, 7.6% with two disorders and 5.5% with three or more disorders. Twelve-month disorders were more common in Māori females than in males (33.6% vs 24.8%) and in younger age groups: 16–24 years, 33.2%; 25–44 years, 32.9%; 45–64 years, 23.7%; and 65 years and over, 7.9%. Disorder prevalence was greatest among Māori with the lowest equivalized household income and least education. However, differences by urbanicity and region were not significant. Of Māori with any 12 month disorder, 29.6% had serious, 42.6% had moderate and 27.8% had mild disorders. Conclusion: Mental disorders overall and specific disorder groups (anxiety, mood and substance) are common among Māori and measures of severity indicate that disorders have considerable health impact. Findings provide a platform for informing public health policy and health sector responses to meeting mental health needs of Māori. [ABSTRACT FROM AUTHOR]

Background: The violent action of mentally ill people is a source of considerable public and professional concern. At times such incidents are subject to inquiry. In England and Wales, homicides by people suffering from mental illness are subject to mandatory external inquiry. Further, the Royal College of Psychiatrists coordinates a confidential research study into homicide and suicide by people in contact with mental health services. Inquiries have raised concern regarding widespread problems in mental health service delivery. Within New Zealand, similar concerns have been raised, but inquiries have been irregular and not of consistent methodology. The paper aims to review 10 years of inquiries into violent incidents to describe their methods, structure and findings. Method: All inquiries into violent actions perpetrated by patients in contact with mental health services between 1988 and 1998 and held by the Ministry of Health were reviewed. The nature of the inquiry, the incident, findings and recommendations were summarized. For each inquiry, an assessment was made as to whether the incident was predictable or preventable. Results: There were 11 incidents leading to 13 inquiries, six of homicide, two of rape, one of the release of a dangerous patient and two in which a patient was shot by police. Two internal inquiries were followed by external inquiries. All inquiries found deficiencies of varying severity, the degree of deficiency being greater with external inquiries. Consistent criticisms related to skill, resource, coordination and communication failures. Two of the 11 inquiries found the incident to be ‘predictable’, and eight to have been ‘preventable’. Conclusions: The problems in New Zealand are similar to those noted in England and Wales. Small numbers of inquiries make firm conclusions difficult, but the authors feel that a mandatory process of independent review of serious incidents is wise. [ABSTRACT FROM AUTHOR]