Is there a fetal origin of depression? Evidence from the Mater University Study of Pregnancy and its outcomes

It is unclear whether there is a fetal origin of adult depression. In particular, previous studies have been unable to adjust for the potential effect of maternal depression during pregnancy on any association. The association of birth weight with adult symptoms of depression was examined in an Australian prospective birth cohort, the Mater University Study of Pregnancy and its outcomes. Depressive symptoms were assessed with the Center for Epidemiologic Studies Depression Scale among 3,719 participants at the 21-year follow-up in 2002-2005. In multivariable analyses, there were a weak inverse association between birth weight and symptoms of depression in the whole cohort and some evidence of sex differences in this association. Among females, there was a graded inverse association: In the fully adjusted model, the odds ratio for a high level of depressive symptoms for a 1-standard deviation increase in birth weight (gestational age-standardized z score) was 0.82 (95% confidence interval: 0.73, 0.92). Among males, there was no association (with sex in all models: p(interaction) < 0.004). Study results provide some support for a fetal origin of adult depression and suggest that the association is not explained by maternal mental health characteristics during pregnancy. Further research is needed to better understand the mechanisms underlying the association.     

Comparison of Ice Hockey Goaltender Helmets for Concussion Type Impacts

Concussions are among the most common injuries sustained by ice hockey goaltenders and can result from collisions, falls and puck impacts. However, ice hockey goaltender helmet certification standards solely involve drop tests to a rigid surface. This study examined how the design characteristics of different ice hockey goaltender helmets affect head kinematics and brain strain for the three most common impact events associated with concussion for goaltenders. A NOCSAE headform was impacted under conditions representing falls, puck impacts and shoulder collisions while wearing three different types of ice hockey goaltender helmet models. Resulting linear and rotational acceleration as well as maximum principal strain were measured for each impact condition. The results indicate that a thick liner and stiff shell material are desirable design characteristics for falls and puck impacts to reduce head kinematic and brain tissue responses. However for collisions, the shoulder being more compliant than the materials of the helmet causes insufficient compression of the helmet materials and minimizing any potential performance differences. This suggests that current ice hockey goaltender helmets can be optimized for protection against falls and puck impacts. However, given collisions are the leading cause of concussion for ice hockey goaltenders and the tested helmets provided little to no protection, a clear opportunity exists to design new goaltender helmets which can better protect ice hockey goaltenders from collisions.     

Learning to practice the discipline of nursing

This column addresses the issues of teaching and growing the discipline of nursing. Experiences of two undergraduate nursing students highlight the benefits and opportunities that accompany the teaching of nursing theories in undergraduate programs. The 3rd-year baccalaureate students, Kendra Fitzsimmons and Elspeth Ferguson, submitted papers from their York University nursing program to help demonstrate key points in this column. Their papers show thoughtful critique and passionate belief in nursing as a discipline and a basic science. Kudos to them and the faculty who inspired them.     

Using clinical outcomes to explore the theory of expert practice in physical therapy

BACKGROUND AND PURPOSE: Theoretical models of physical therapist expertise have been developed through research on physical therapists sampled solely on the basis of years of experience or reputation. Expert clinicians, selected on the basis of their patients' outcomes, have not been previously studied, nor have the patient outcomes of peer-nominated experts been analyzed. The purpose of our study was to describe characteristics of therapists who were classified as expert or average therapists based on the outcomes of their patients. SUBJECTS: Subjects were 6 therapists classified as expert and 6 therapists classified as average through retrospective analysis of an outcomes database. METHODS: The study was guided by grounded theory method, using a multiple case study design. Analysis integrated data from quantitative and qualitative sources and developed a grounded theory. RESULTS: All therapists expressed a commitment to professional growth and an ethic of caring. Therapists classified as expert were not distinguished by years of experience, but they differed in academic and work experience, utilization of colleagues, use of reflection, view of primary role, and pattern of delegation of care to support staff. Therapists classified as expert had a patient-centered approach to care, characterized by collaborative clinical reasoning and promotion of patient empowerment. DISCUSSION AND CONCLUSION: These findings add to the understanding of factors related to patient outcomes and build upon grounded theory for elucidating expert practice in physical therapy.