Publications

A neglected topic in aging depression research is the potential role of the parent-adult child relationship. In this study we examined whether adult children's reports of having relied upon parents for instrumental and expressive support are associated with parents' depressive symptoms. The sample included 304 parents (aged 50-72 years), matched to a randomly selected adult offspring, from the University of Southern California Longitudinal Study of Generations. We measured parents' depressive symptoms by using the Center for Epidemiologic Studies Depression Scale at baseline and 3 and 6 years later. The final longitudinal analysis showed that, when we adjusted for relevant variables including age, gender, income, self-rated health, and child's depressive symptoms, the adult child's reliance on instrumental support was associated with fewer parental depressive symptoms (p =.036). Expressive support did not show the same pattern. Thus, adult children's reliance on instrumental support might contribute to their parents' mental health.

Because falls are highly prevalent, harmful events for older adults, identification of patients at risk is a high priority for home health care agencies. Using routine administrative data, we demonstrated that patients with depressive symptoms on the Outcome and Assessment Information Set are at risk for falls. A prospective case-control study that matched 54 patients who experienced an adverse fall with 854 controls showed that patients who fell had twice the odds of being depressed (odds ratio = 1.90, 95% confidence interval = 1.01 to 3.59). Bowel incontinence, high medical comorbidity, stair use, injury and poisoning, memory deficit, and antipsychotic medication use were also predictors, but no association was found for antidepressant medications. These data suggest the potential benefit of including depression screening for multifactorial fall prevention interventions.

Older workers' share of involuntary job losses in the United States has grown fairly consistently in recent decades, prompting greater interest in the health consequences of involuntary unemployment among individuals nearing retirement. In this study, the authors applied the multifactorial model of geriatric health to investigate whether late-career involuntary job loss was associated with subsequent physical disability and whether the effect of involuntary job loss on physical disability varied by predisposition. Using data from the first four waves (1992 to 1998) of the Health and Retirement Survey, the authors measured predisposition with individual risk factors for functional disability and indices of aggregate risk. The results of gender-specific models fit with generalized estimating equations revealed that unmarried women and those with low predisplacement incomes had heightened risk for subsequent functional disability. No differential effects of job loss were found for men.

We present a case study using a multilevel modeling approach to determine whether depressive symptoms are affected by genetic factors. Existing studies examining this question have focused on twins. The present study built on the literature by conducting a preliminary study of the heritability of depressive symptoms within extended families. At the same time, this study assessed the need for adjustment of a heritability measure in a family study using a multigenerational sample. The sample consisted of 230 community-dwelling extended families that included 431 adult offspring, comprising full siblings, half siblings and cousins that participated in the University of Southern California Longitudinal Study of Generations. All participants filled out the Center for Epidemiologic Studies Depression (CES-D) scale. The multilevel analysis allowed us to model the natural hierarchy of the extended family. Results indicate that the proportion of the phenotypic variance for CES-D that occurs due to genetic differences is not significantly larger than zero among these participants [h(2) = 8.6%, 95% confidence interval (CI) = 0-57%, p = 0.71]. Our findings suggest that future studies examining depressive symptoms in this sample can focus on non-genetic explanatory factors without the necessity to control for genetic variation. However, our study may be limited by measurement of prevalent depressive symptoms, which may not generalize to lifetime depressive symptoms.

OBJECTIVE

This study evaluated the association between depression and hospitalization among geriatric home care patients.

METHODS

A sample of 477 patients newly admitted to home care over two years was assessed for depression. Bivariate and logistic regression analyses examined the likelihood of hospitalization during a 60-day home care episode.

RESULTS

The hospitalization rate was similar for the 77 depressed patients and 400 nondepressed patients (about 7%). However, mean time to hospitalization was 8.4 versus 19.5 days after start of care, respectively. Hospitalization risk was significantly higher for depressed patients during the first few weeks. A main effect for depression and a depression-by-time interaction was found when analyses controlled for medical comorbidity, cognitive status, age, gender, race, activities of daily living and instrumental activities of daily living, and referral to home care after hospitalization.

CONCLUSIONS

Depression appears to increase short-term risk of hospitalization for geriatric home care patients immediately after starting home care.

The Gorkha earthquake (magnitude 7.8) on 25 April 2015 and later aftershocks struck South Asia, killing ~9000 people and damaging a large region. Supported by a large campaign of responsive satellite data acquisitions over the earthquake disaster zone, our team undertook a satellite image survey of the earthquakes' induced geohazards in Nepal and China and an assessment of the geomorphic, tectonic, and lithologic controls on quake-induced landslides. Timely analysis and communication aided response and recovery and informed decision-makers. We mapped 4312 coseismic and postseismic landslides. We also surveyed 491 glacier lakes for earthquake damage but found only nine landslide-impacted lakes and no visible satellite evidence of outbursts. Landslide densities correlate with slope, peak ground acceleration, surface downdrop, and specific metamorphic lithologies and large plutonic intrusions.

OBJECTIVE

To determine if trauma exposure is associated with suicidal ideation in a nationally representative sample of older adults.

METHODS

This study included 3,277 participants 55 years and older involved in the Collaborate Psychiatric Epidemiology Surveys (2001-2003).

RESULTS

Of the 84.8% of older adults who were exposed to any trauma, 2.2% endorsed late-life suicidal ideation. Multivariable models fully adjusted for sociodemographics, post-traumatic stress disorder, major depressive disorder, and substance use revealed exposure to serious accidents/illness was associated with suicidal ideation (odds ratio: 2.55; 95% confidence interval: 1.16-5.59; Wald χ(2) = 5.47, df = 1, p = 0.019). Investigation of specific traumas within the category revealed that life-threatening illness was specifically associated with suicidal ideation in older adults (odds ratio: 2.12; 95% confidence interval: 1.34-3.36; Wald χ(2) = 10.33, df = 1, p = 0.001).

CONCLUSION

These findings highlight the need for monitoring of suicidal ideation among older adults who have been informed of a life-threatening illness diagnosis.

BACKGROUND

Little is known about the association between trauma exposure and suicidal ideation across racial/ethnic groups. Our study aim was to determine the association between trauma exposure and suicidal ideation in a nationally representative ethnically diverse sample of adults.

METHODS

This study included 14,866 White, Hispanic, Black, and Asian participants 18 years and older involved in the Collaborate Psychiatric Epidemiology Surveys (2001-2003), comprised of three nationally representative studies (NCS-R, NSAL, and NLAAS). Lifetime history of suicidal ideation as assessed in the World Health Organization's World Mental Health Survey Initiative version of the Composite International Diagnostic Interview (WMH-CIDI).

RESULTS

Of the 81% respondents who reported being exposed to trauma as assessed in the WMH-CIDI, 12.1% endorsed lifetime suicidal ideation. Additionally, of the 19% who did not report trauma, 1.1% endorsed lifetime suicidal ideation. Fully adjusted, multivariable logistic regression models revealed two traumas consistently associated with significantly higher odds for suicidal ideation across all four racial groups examined: Assaultive/interpersonal violence and child maltreatment. Asians, in particular, had the highest likelihood for suicidal ideation in both trauma categories, with a near threefold increased odds for assaultive/interpersonal violence exposure (OR: 2.56; 95% CI: 1.71-3.83) and nearly ninefold increased odds for child maltreatment exposure (OR: 8.43; 95% CI: 4.91-14.49).

DISCUSSION

Suicidal ideation in racially/ethnically diverse American adults is strongly associated with assaultive/interpersonal violence and child maltreatment, independent of PTSD, MDD, and substance use. These findings highlight the need for monitoring of suicidal behavior following assaultive/interpersonal trauma and child maltreatment, regardless of the presence of a psychiatric disorder.