• Publications
  • Influence
Toward a clinical model of suicidal behavior in psychiatric patients.
OBJECTIVE Risk factors for suicide attempts have rarely been studied comprehensively in more than one psychiatric disorder, preventing estimation of the relative importance and the generalizabilityExpand
  • 1,447
  • 70
One hundred years of schizophrenia: A meta-analysis of the outcome literature
OBJECTIVE This study was undertaken to assess the twentieth-century literature on outcome in schizophrenia for historical trends that might be associated with changes in diagnostic and therapeuticExpand
  • 335
  • 21
  • PDF
Sample Size Estimation for Longitudinal Designs with Attrition: Comparing Time-Related Contrasts Between Two Groups
Formulas for estimating sample sizes are presented to provide specified levels of power for tests of significance from a longitudinal design allowing for subject attrition. These formulas are derivedExpand
  • 293
  • 21
Some conceptual and statistical issues in analysis of longitudinal psychiatric data. Application to the NIMH treatment of Depression Collaborative Research Program dataset.
Longitudinal studies have a prominent role in psychiatric research; however, statistical methods for analyzing these data are rarely commensurate with the effort involved in their acquisition.Expand
  • 716
  • 15
  • PDF
Suicidal behavior in bipolar mood disorder: clinical characteristics of attempters and nonattempters.
OBJECTIVE Bipolar Disorder is associated with a higher frequency of attempted suicide than most other psychiatric disorders. The reasons are unknown. This study compared bipolar subjects with aExpand
  • 263
  • 15
Low-level lead exposure and children's cognitive function in the preschool years.
In a cohort of 170 middle and upper-middle class children participating in a prospective study of child development and low-level lead exposure, higher blood lead levels at age 24 months wereExpand
  • 391
  • 13
Longitudinal analyses of prenatal and postnatal lead exposure and early cognitive development.
In a prospective cohort study of 249 children from birth to two years of age, we assessed the relation between prenatal and postnatal lead exposure and early cognitive development. On the basis ofExpand
  • 777
  • 12
Asymptotic distribution of the sample roots for a nonnormal population
SUMMARY The distribution of the characteristic roots of the sample covariance matrix is studied for multivariate populations with finite fourth cumulants. For large sample sizes, the asymptotic formsExpand
  • 131
  • 11
Cigarette smoking, suicidal behavior, and serotonin function in major psychiatric disorders.
OBJECTIVE Cigarette smoking is associated with a higher risk for suicide and attempted suicide, but psychopathological or biological explanations for this association have not been explored. LowerExpand
  • 230
  • 10
  • PDF