Development of the Perinatal Depression Inventory (PDI)-14 using item response theory: a comparison of the BDI-II, EPDS, PDI, and PHQ-9.

The objective of this study is to develop a simple, brief, self-report perinatal depression inventory that accurately measures severity in a number of populations. Our team developed 159 Likert-scale perinatal depression items using simple sentences with a fifth-grade reading level. Based on iterative cognitive interviewing (CI), an expert panel improved and winnowed the item pool based on pre-determined criteria. The resulting 67 items were administered to a sample of 628 pregnant and 251 postpartum women with different levels of depression at private and public sector obstetrics clinics, together with the Beck Depression Inventory (BDI-II), Edinburg Postpartum Depression Scale (EPDS), and the Patient Health Questionnaire (PHQ-9), as well as Module A of the Structured Clinical Interview for DSM-IV Diagnoses (SCID). Responses were evaluated using Item Response Theory (IRT). The Perinatal Depression Inventory (PDI)-14 items are highly informative regarding depression severity and function similarly and informatively across pregnant/postpartum, white/non-white, and private-clinic/public-clinic populations. PDI-14 scores correlate well with the PHQ-9, EPDS, and BDI-II, but the PDI-14 provides a more precise measure of severity using far fewer words. The PDI-14 is a brief depression assessment that excels at accurately measuring depression severity across a wide range of severity and perinatal populations.

Mothers of children with inflammatory bowel disease: a controlled study of adult attachment classifications and patterns of psychopathology.

We inquire into parental correlates of illness expression in three pediatric diagnoses: Inflammatory Bowel Disease, cancer and renal disease. Children with cancer and renal disease were the comparison groups, using valid pediatric measures for comparison across diagnostic categories in chronic illness. We found compromised parental support in families with IBD children, comparing relations among child's medical adjustment, parental attachment and psychopathology profiles. Higher rates of insecure attachment are found in mothers of children with IBD; these mothers exhibit increased psychiatric symptoms. The results emphasize: 1) supporting the parent-child relationship, 2) parental well-being, and 3) possible precipitants of gene regulated onset of IBD contributing to illness severity and course. We offer a theoretical model considering four factors for IBD gene regulated onset. This preliminary study should encourage longitudinal studies of attachment in chronic illness, particularly IBD.