A reevaluation of the use of rhizome scars to age plants of Trillium erectum (Melanthiaceae)1.

Premise Of Study: Herbaceous perennials are important long-lived plants in North American forests. Trillium has been used as a model organism to examine the effects of ecological processes on age structure in herbaceous forest perennials. Here, the methods of aging Trillium rhizomes are critically examined.

Psychopathology as a predictor of medical service utilization for youth in residential treatment.

Rising health care costs have led to an emphasis on identifying factors that contribute to medical service utilization. Previous research has suggested an association between youth psychopathology and service utilization; however, prospective studies among high-risk populations are needed. The current study examined youth psychopathology as a predictor of subsequent medical service utilization among a large sample (N = 536) of youth entering residential treatment.

Prevalence of physical health problems among youth entering residential treatment.

Objective: To examine the prevalence of physical health problems among youth entering residential treatment.

Patients And Methods: The sample included 1744 youth (mean age: 14.6 ± 1.