Psychometric properties of the positive mental health instrument among people with mental disorders: a cross-sectional study

The Mental Health of Patients With Psychotic Disorder From a Positive, Multidimensional and Recovery Perspective

Positive mental health (PMH) and mental illness are distinct, yet interrelated, constructs. However, this relationship has yet to be adequately established. We aimed to evaluate the level of PMH and its relationship with sociodemographic and clinical determinants as well as to explore the relationship between PMH and the positive constructs of recovery, subjective wellbeing (SWB), insight and functioning in patients with psychotic disorder. A multicenter, descriptive, cross-sectional and correlational study with a sample of 347 patients with psychotic disorder was conducted. The following assessment instruments were used: Positive Mental Health Questionnaire, Maryland Assessment of Recovery in Serious Mental Illness scale, Insight Scale, Personal Wellbeing Index-Adult version (PWI-A), Overall Life Satisfaction (OLS) and Global Assessment of Functioning scale. The mean global level of PMH was 116.16 (range of 39–156, SD = 19.39). Significant differences were found in PMH in relation to sociodemographic (sex, civil status and employment situation) and clinical variables (family history of mental disorders, number of prescribed antipsychotics, treatment with anxiolytics, treatment with antidepressants and suicide attempts). PMH was significantly and positively correlated with recovery (r = 0.760), SWB (PWI-A: r = 0.728 and OLS: r = 0.602) and functioning (r = 0.243), and negatively with insight (r = −0.335). These results can lead to a major change in mental health care. If actions are taken to increase PMH, then recovery, SWB and functioning will also increase. At the same time, interventions should be carried out to boost insight, since increasing PMH could decrease insight, all resulting in better quality of life for patients with psychotic disorder.

Development of the Chinese, Malay and Tamil translations of the Positive Mental Health Instrument: Cross-cultural adaptation, validity and internal consistency

This study describes the development and validation of Chinese, Malay and Tamil translations of the Positive Mental Health Instrument (PMHI) in a general population sample in Singapore. Translations were performed using two independent forward translations followed by expert panel discussions and tested for content, construct and language appropriateness using focus group discussions. The final translated tools were field-tested among 220 residents per language using self-administered questionnaires comprising the translated PMHI and other validity measures. Missing data, floor and ceiling effects, confirmatory factor analysis (CFA), internal consistency, item response theory differential item functioning (IRT-DIF) and criterion validity were assessed. A total of 10 PMHI-Chinese items, 26 PMHI-Malay items and six response categories and six PMHI-Tamil items were modified based on expert panel and focus group discussions. PMHI had low missing data and showed negative but acceptable skewness (<2) and kurtosis (<7) for all translations, except for the PMHI-Malay "spirituality" subscale (skewness: -2.8; kurtosis: 12.5). CFA showed that all three PMHI translations fulfilled the original six-factor-higher-order structure (RMSEA = 0.05, CFI = 0.962, TLI = 0.96). Cronbach's alpha coefficients for total PMHI were 0.958, 0.954, 0.945 and 0.949 in the overall sample and the Chinese, Malay and Tamil translations, respectively. The three translations of the PMHI showed expected and significant positive (r = 0.116 to 0.663) and negative correlations (r = -0.137 to -0.574) with established measures. The findings show that the Chinese, Malay and Tamil translations of the PMHI have high internal consistency and validity in this multi-ethnic population.

Tradução, adaptação cultural e validação do Frail Non-Disabled Questionnaire para o contexto brasileiro

Resumo Objetivo Traduzir, adaptar e validar o Frail Non-Disabled Questionnaire (FiND) para o contexto brasileiro. Método Foram seguidas as etapas preconizadas para instrumentos da área da saúde: tradução inicial, síntese das traduções, retrotradução, revisão por um comitê de especialistas, pré-teste e avaliação das propriedades psicométricas da escala. Todos os preceitos éticos foram seguidos. Resultados A tradução e a retrotradução foram realizadas por dois tradutores independentes e qualificados. A revisão por especialistas demonstrou sua validade de conteúdo. No pré-teste, o FiND foi de fácil compreensão e aplicação. Na avaliação das propriedades psicométricas, o instrumento demonstrou valores satisfatórios de confiabilidade e reprodutibilidade. A validade de critério concorrente foi verificada, encontrando correlação positiva com significância estatística entre o escore do FiND e do Fenótipo de Fragilidade de Fried, e valores satisfatórios de sensibilidade, especificidade, valores preditivos positivo e negativo, e acurácia. A validade de construto convergente foi analisada, indicando correlação positiva estatisticamente significante entre o escore do FiND e os sintomas depressivos, e correlações negativas com o estado nutricional, cognitivo, e com os domínios do componente físico da qualidade de vida. A validade discriminante foi analisada por meio da comparação das médias do FiND entre os grupos: robusto, não frágil e frágil, com e sem sintomas depressivos, com melhor e com pior percepção de qualidade de vida, e com estado nutricional adequado, sob risco de desnutrição e com estado de desnutrição, as quais mostraram-se estatisticamente significantes. Conclusão O FiND encontra-se traduzido, adaptado e validado para o contexto brasileiro.

Development and validation of the Rapid Positive Mental Health Instrument (R-PMHI) for measuring mental health outcomes in the population

Background

The multidimensional Positive Mental Health Instrument (PMHI) has 47 items and six subscales. This study aimed to develop and validate a short unidimensional version of the PMHI among Singapore’s adult resident population.

Methods

Using pooled data from three earlier studies (n = 1050), PMHI items were reduced by Partial Credit Rasch Model (PCRM) runs in a random split-half sample, while psychometric properties of the resulting measure were tested through confirmatory factor analysis (CFA), item response theory-graded response model and internal consistency reliability in the other half. Its reliability, construct and concurrent validity, agreement with the original scale, floor and ceiling effect, and scale estimates were further investigated in an external representative general population sample (n = 1925).

Results

The average age of the participants was around 41 years. Four PCRM re-runs for item selection resulted in a 6-item unidimensional Rapid PMHI (R-PMHI). CFA confirmed the unidimensional structure of the R-PMHI in the internal (RMSEA = 0.075, CFI = 0.985, TLI = 0.974) and external (RMSEA = 0.051, CFI = 0.992, TLI = 0.987) validation samples. In the external validation sample, the R-PMHI met concurrent validity criteria, showing high agreement with the 47-item version with intra-class correlation coefficient of 0.872 (95% CI: 0.861 to 0.882) and low floor and ceiling effects. Weight-adjusted mean (SE, 95% CI) R-PMHI score in the population was 4.86 (0.2, 4.82–4.90).

Conclusion

The unidimensional 6-item R-PMHI offers brevity over the original multidimensional measure while appropriately representing the positive mental health construct. Prospective studies are needed to assess its responsiveness and test-retest reliability.

Development and calibration of a novel positive mindset item bank to measure health-related quality of life (HRQoL) in Singapore

BACKGROUND

Positive mindset (PM) is an important domain of health-related quality of life in Singapore, a multi-ethnic urban city state in Southeast Asia. We therefore developed and calibrated a novel item bank to measure and improve PM.

METHODS

We developed an initial candidate pool of 48 items from focus groups, in-depth interviews and existing instruments locally developed and validated for use in Singapore. We administered all items in English to a multi-stage sample stratified for age and gender, of subjects with and without medical conditions recruited from the community and a hospital, and calibrated their responses using Samejima's Graded Response Model. We evaluated a final 36-item bank with respect to Item Response Theory (IRT) model assumptions, model fit, differential item functioning (DIF), concurrent and known-groups validity.

RESULTS

Among 493 participants (49.3% male, 41.6% above 50 years old, 33% Chinese, Malay and Indian), bifactor model analyses supported unidimensionality: explained common variance of the general factor was 0.86 and omega hierarchical was 0.97. Local independence was deemed acceptable: the average absolute residual correlations were <0.06 and 3.3% of the total item-pair residuals were flagged for local dependence. The overall model fit was adequate and provided good coverage of the PM construct (theta range: -3.6 to +2.4). Five items exhibited DIF with respect to ethnicity and gender, but were retained without modification of scores because they measured important aspects of PM. Scores correlated in the hypothesized direction with a self-reported measure of global health (Spearman's rho = -0.28, p<0.001) and discriminated between groups of participants with and without a self-reported diagnosis of a mood disorder (p = 0.007) adjusting for age, gender, ethnicity, education and marital status.

CONCLUSION

The 36-item PM item bank demonstrated satisfactory psychometric properties for the English-speaking Singaporean population. IRT model assumptions were sufficiently met and scores showed concurrent and known-groups validity. Future studies to evaluate the validity of PM scores when items are administered adaptively are needed.

Psychometric properties and population norms of the positive mental health instrument in a representative multi-ethnic Asian population

Background

Measures of mental well-being and positive mental health (PMH) have been largely developed and used in Western populations, however, data on representative Asian communities are lacking. Using data from a population sample, this study sought to establish psychometric properties and norms of the PMH Instrument (PMH-I), a measure of positive mental health developed in Singapore.

Methods

We conducted a nationally representative survey among 1925 adults aged 18–79 years of Chinese, Malay, Indian or other ethnicity. Participants reported socio-demographic characteristics and completed the PMH-I along with measures of health-related quality of life (HRQoL) and psychological distress. Construct validity of the PMH-I was assessed using confirmatory factor analysis and concurrent validity was tested through correlation with other psychological measures. Normative PMH values and differences in population subgroups were estimated.

Results

The six-factor-higher-order structure of the PMH-I comprising six subscales of general coping, emotional support, spirituality, interpersonal skills, personal growth and autonomy and global affect was confirmed. Concurrent validity was shown through significant positive correlation of the total PMH score and its subscales with HRQoL and an inverse correlation with psychological distress. Weighted age, gender and ethnicity-specific norms were derived for the Singapore population. Total PMH was significantly higher in participants aged over 40 years as compared with 18–29 year olds and in non-Chinese ethnic groups as compared with Chinese. These differences were observed for all PMH-I subscales, with the exception of emotional support and interpersonal skills score differences by age. In contrast, gender, marital status, and education level were significantly associated with some of the subscales, but not with total PMH.

Conclusions

These results support the psychometric properties of the PMH-I in a multi-ethnic Asian population sample. The generalizable population-based norms support the application of the PMH-I for measuring mental health and assessing its determinants within the Singapore general population.

Electronic supplementary material

The online version of this article (10.1186/s12874-018-0487-9) contains supplementary material, which is available to authorized users.

Psychometric properties of the short Warwick Edinburgh mental well-being scale (SWEMWBS) in service users with schizophrenia, depression and anxiety spectrum disorders

Background

To establish the validity and reliability of the Short Warwick Edinburgh Mental Well-being Scale (SWEMWBS) in service users with schizophrenia, depression and anxiety spectrum disorders in Singapore and estimate SWEMWBS scores across socio-demographic and the three psychiatric diagnostic groups in the sample.

Methods

This secondary analysis was conducted using data from a study among outpatients of a tertiary psychiatric hospital. In addition to the SWEMWBS, socio-demographic data and current psychiatric diagnosis were collected. Service users were also administered the Global Assessment of Functioning (GAF), Patient Health Questionnaire (PHQ)-8, Generalised Anxiety Disorder (GAD)-7, Satisfaction with Life Scale (SWLS) and the Positive Mental Health (PMH) instrument. The SWEMWBS was tested for factorial validity, reliability and convergent and divergent validity.

Results

In total, 350 service users with a mean (SD) age of 39.1 (11.1) years were included in this study of which 39.4%, 38.9% and 21.7% had schizophrenia, depression and anxiety spectrum disorders, respectively. The single factor structure of the SWEMWBS was confirmed by confirmatory factor analysis (CFI = 0.969, TLI = 0.954, RMSEA = 0.029). The internal consistency reliability was high (Cronbach’s alpha = 0.89). The convergent and divergent validity testing revealed that the SWEMWBS scores had significant moderate to high positive correlations with GAF, SWLS and PMH scores and moderate negative correlations with (PHQ)-8 and (GAD)-7 scores. SWEMWBS scores were higher in married participants (22.2 (5.4) versus never married: 20.7 (5.3) and divorced/separated/widowed: 20.4 (5.1), p = 0.049) and among those with schizophrenia (22.8 (5.5) versus depression:19.6 (4.7) and anxiety spectrum disorders 20.9 (5.2), p < 0.001).

Conclusion

These results demonstrate adequate validity and reliability of the SWEMWBS in people with schizophrenia, depression and anxiety spectrum disorders in Singapore.

Positive mental health among health professionals working at a psychiatric hospital

BACKGROUND

Positive mental health (PMH) is a combination of emotional, psychological and social well-being that is necessary for an individual to be mentally healthy. The current study aims to examine the socio-demographic differences of PMH among mental health professionals and to explore the association between job satisfaction and total PMH.

METHODS

Doctors, nurses and allied health staff (n = 462) completed the online survey which included the multidimensional 47-item PMH instrument as well as a single item job satisfaction question. Associations of PMH with job satisfaction were investigated via linear regression models.

RESULTS

Significant differences in PMH total and domain specific scores were observed across socio-demographic characteristics. Age and ethnicity were significantly correlated with PMH total scores as well as various domain scores, while gender, marital and residency status and the staff's position were only significantly correlated with domain specific scores. Job satisfaction was also found to be a significantly associated with total PMH.

CONCLUSION

The workplace is a key environment that affects the mental health and well-being of working adults. In order to promote and foster PMH, workplaces need to consider the importance of psychosocial well-being and the wellness of staff whilst providing an environment that supports and maintains overall health and work efficiency.

Gender differences in positive mental health among individuals with schizophrenia

OBJECTIVE

This article aims to investigate the gender differences in positive mental health among outpatients with schizophrenia.

METHODS

142 outpatients (aged 21-65 years) with schizophrenia spectrum disorders were recruited from a tertiary psychiatric hospital. They were administered the following instruments: The Positive Mental Health (PMH) instrument, Patient Health Questionnaire (PHQ)-8 and Generalized Anxiety Disorder (GAD)-7, and the Global Assessment of Functioning (GAF) scale. Socio-demographic and clinical characteristics were gathered from interviews with the participants as well as from their medical records. Independent t-tests and chi-square tests were performed to investigate the gender differences in PMH total and domain-specific scores. Association of socio-demographic and clinical characteristics with PMH was furthered explored in men and women independently using multiple linear regression analyses using backward stepwise method.

RESULTS

PMH total score and Emotional Support (ES) and Global Affect (GA) sub-scale scores were significantly higher among women vs men (PMH = 4.41 vs 4.07, p value = 0.01 and domains ES = 4.56 vs 3.84, p value < 0.01 and GA = 4.44 vs 4.02, p value = 0.01), given that the men and women samples did not differ significantly in their socio-demographic and clinical profiles. After adjusting for all covariates, men with no formal/ primary education were significantly associated with lower PMH total score than those with higher (secondary, A level, pre-university) education. Men belonging to Malay ethnic group had significant higher PMH total score compared to men of Chinese ethnicity. Among the women samples, those with depression as measured by PHQ-8 had significantly lower scores in the PMH total score and higher GAF score was associated with significantly higher scores in PMH total score.

CONCLUSIONS

This study identified gender differences in PMH of patients with schizophrenia spectrum disorders whereby women had higher PMH total score and domain scores than men. The study also identified factors associated with PMH which can aid in designing gender appropriate mental health interventions.

Positive mental health in outpatients: comparison within diagnostic groups

BACKGROUND

Positive mental health (PMH) supplements the definition of mental health which is not just the mere absence of mental illness. It encompasses an individual's social, emotional and psychological well-being. This cross-sectional study examines the PMH levels in a multi-ethnic outpatient population and the socio-demographic correlates of PMH across the various diagnostic groups. In addition comparisons with the general population were conducted.

METHODS

Outpatients with schizophrenia spectrum, depressive or anxiety disorders seeking treatment at a tertiary psychiatric care hospital were included in the study sample. All respondents completed the PMH instrument. Independent t-tests and ANOVA with Bonferroni post-hoc tests were used to establish differences between the PMH levels and domains.

RESULTS

Three hundred and sixty outpatients with a mean age of 39.2 years were included in the study. 52.5% were younger adults (21-39 years). There were slightly more males (50.8%) and 56.1% of the sample was unemployed. PMH scores differed between the patient and general populations. There were significant associations of the PMH domains with socio-demographic variables such as age, ethnicity, gender and education status in the patient population.

CONCLUSIONS

PMH can be viewed as a protective factor of mental illnesses. As such it is critical that mental health professionals examine the domains of PMH in individuals with mental illnesses. This will in turn allow them to develop coping strategies that can look into focusing on emotional, psychological and social well-being appropriately to allow these individuals to thrive.

Positive mental health in outpatients with affective disorders: Associations with life satisfaction and general functioning

BACKGROUND

Positive mental health (PMH) is an integral and essential component of health that encompasses emotional, psychological and social well-being. The Keyes' two continua model of mental health and illness posits that mental health status is not merely the absence of mental health problems, and it can be enhanced regardless of a diagnosis of mental illness. The present study hypothesized that mentally ill patients with higher levels of PMH would be associated with better life satisfaction and general functioning.

METHODS

218 outpatients with affective disorders at a tertiary psychiatric hospital were recruited and administered the multidimensional Positive Mental Health instrument, which was validated and developed in Singapore to measure PMH. Depression and anxiety severity were also assessed. Associations of positive mental health with life satisfaction and general functioning were investigated in linear regression models.

RESULTS

PMH scores varied largely within patients with depressive and anxiety disorders but did not differ statistically across the two diagnoses, except for emotional support. PMH was associated with both life satisfaction and general functioning with little evidence of confounding by sociodemographic and clinical status.

LIMITATIONS

The cross-sectional design of the study could not examine causal relationships. Findings may be restrictive to treatment-seeking population with specific affective disorders.

CONCLUSION

Our study provides evidence to support the notion that a good mental health state is not simply the absence of a mental disorder. Mentally ill patients can also have high levels of PMH that possibly have a moderating or mediating effect on the relationship between patients' clinical symptoms and life satisfaction or general functioning.