Lauren E. Wisk

Clinical and Radiographic Results of Metal-on-Metal Hip Resurfacing with a Minimum Ten-Year Follow-up

BACKGROUND There was a need for information about the long-term performance of the modern generation of hip resurfacing implants. A retrospective review of the first 100 hips that had implantation of one resurfacing design and had been followed for a minimum of ten years was performed. METHODS Between 1996 and 1998, 100 CONSERVE PLUS hip resurfacing devices were implanted by a single surgeon in eighty-nine patients. The mean age of the patients was 49.1 years, and fifty-nine patients were male. Primary osteoarthritis was the etiology for sixty-four hips. All patients were assessed clinically and radiographically. RESULTS The mean duration of follow-up was 11.7 years (range, 10.8 to 12.9 years). Two patients were lost to follow-up, and five patients died of causes unrelated to the surgery. Eleven hips had conversion to total hip arthroplasty because of loosening of the femoral component (eight), a femoral neck fracture (one), recurrent subluxation (one), and late infection (one). The Kaplan-Meier survivorship was 88.5% at ten years. None of the resurfacing arthroplasties failed in the twenty-eight hips that had a femoral component of >46 mm and no femoral head cystic or necrotic defects of >1 cm. Five hips had narrowing of the femoral neck, three had radiolucent zones interpreted as osteolysis, and twenty had signs of neck-socket impingement. Five hips had radiolucencies around the metaphyseal stem (two partial and three complete) that had been stable for 7.8 to 10.2 years. The mean scores on the University of California at Los Angeles (UCLA) system at the time of the latest follow-up were 9.5 points for pain, 9.3 points for walking, 8.9 points for function, and 6.8 points for activity; the mean scores on the physical and mental components of the Short Form-12 (SF-12) were 47.3 and 50.5 points, respectively; and the mean Harris hip score was 90 points. CONCLUSIONS The results of the present series constitute a reference point to which subsequent series should be compared. These ten-year results in a group of young patients are satisfactory, and the low rate of osteolysis is encouraging, but longer follow-up is required for comparison with conventional total hip arthroplasty.

Does the perception that stress affects health matter? The association with health and mortality.

OBJECTIVE This study sought to examine the relationship among the amount of stress, the perception that stress affects health, and health and mortality outcomes in a nationally representative sample of U.S. adults. METHODS Data from the 1998 National Health Interview Survey were linked to prospective National Death Index mortality data through 2006. Separate logistic regression models were used to examine the factors associated with current health status and psychological distress. Cox proportional hazard models were used to determine the impact of perceiving that stress affects health on all-cause mortality. Each model specifically examined the interaction between the amount of stress and the perception that stress affects health, controlling for sociodemographic, health behavior, and access to health care factors. RESULTS 33.7% of nearly 186 million (unweighted n = 28,753) U.S. adults perceived that stress affected their health a lot or to some extent. Both higher levels of reported stress and the perception that stress affects health were independently associated with an increased likelihood of worse health and mental health outcomes. The amount of stress and the perception that stress affects health interacted such that those who reported a lot of stress and that stress impacted their health a lot had a 43% increased risk of premature death (HR = 1.43, 95% CI [1.2, 1.7]). CONCLUSIONS High amounts of stress and the perception that stress impacts health are each associated with poor health and mental health. Individuals who perceived that stress affects their health and reported a large amount of stress had an increased risk of premature death.

Stress-mediated quality of life outcomes in parents of childhood cancer and brain tumor survivors: a case–control study

PurposeTo determine if caring for a child with cancer or a brain tumor affects parental health and mental health and if and to what extent stress mediates the relationship between case status and parental quality of life.MethodsIn person interviewer-assisted surveys were administered to 74 case dyads (children diagnosed with cancer or a brain tumor and their parents) and 129 control dyads (children without health problems and their parents from a community sample) to assess health-related quality of life and perceived levels of stress.ResultsParents of children with cancer or a brain tumor had significantly worse health-related quality of life, including worse overall mental health. Overall physical health was no different between cases and controls. Staged multivariate analysis revealed that worse health-related quality of life is completely mediated by perceived stress in these parents.ConclusionsThe experience of caring for a child with cancer is not in itself related to poor quality of life, but is related to an increased level of stress that may adversely impact parental mental health and quality of life.

Complications after metal-on-metal hip resurfacing arthroplasty.

This article determines the incidence and cause of the complications commonly associated with metal-on-metal hip resurfacing implants and the proposed methods to prevent these complications. The literature available in PubMed was reviewed. Complication rates after hip resurfacing are low, and the procedure has shown both safety and efficacy in the hands of surgeons trained in specialized centers. Proper surgical technique can further reduce the incidence of femoral neck fracture, component loosening, and abnormal wear of the prosthesis. A more systematic detection of adverse local tissue reactions is needed to provide accurate assessments of their prevalence.

Maternal Stressful Life Events Prior to Conception and the Impact on Infant Birth Weight in the United States

OBJECTIVES We sought to determine if and to what extent a womans exposure to stressful life events prior to conception (PSLEs) were associated with subsequent infant birth weight by using a nationally representative sample of US women. METHODS We examined 9350 mothers and infants participating in the first wave of the Early Childhood Longitudinal Study, Birth Cohort in 2001. Weighted regressions estimated the effect of exposure on very low and low birth weight, adjusting for maternal sociodemographic and health factors and stress during pregnancy. RESULTS Twenty percent of women experienced any PSLE. In adjusted analyses, exposed women were 38% more likely to have a very low birth weight infant than nonexposed women. Furthermore, the accumulation of PSLEs was associated with reduced infant birth weight. CONCLUSIONS This was the first nationally representative study to our knowledge to investigate the impact of PSLEs on very low and low birth weight in the United States. Interventions aimed to improve birth outcomes will need to shift the clinical practice paradigm upstream to the preconception period to reduce womens exposure to stress over the life course and improve the long-term health of children.

Sex as a Patient Selection Criterion for Metal-on-Metal Hip Resurfacing Arthroplasty

Short-term to midterm results of hip resurfacing arthroplasty suggest various contraindications, in particular the female sex. This study evaluates survivorship and clinical outcomes of a large patient cohort to determine whether sex itself has a detrimental effect on the results of hip resurfacing. We compared the clinical and survivorship results of men and women from a series of 1107 resurfaced hips in 923 patients (681 males and 242 females). Women saw greater positive changes in walking, function, and the mental component of the Short Form-12. There was no difference in complication rates between men and women. Although the revision rate was higher in the womens group, the effect of sex disappeared when adjusted for component size and surgical technique. These data suggest that there is no appreciable effect of sex on implant survivorship and that women may be excellent candidates for resurfacing with proper surgical technique. This is a level III, retrospective comparative study.

Predictors of Delayed or Forgone Needed Health Care for Families With Children

BACKGROUND: We sought to determine how health care–related financial burden, childhood activity limitations, health insurance, and other access-related factors predict delayed or forgone care for families with children, using a nationally representative, population-based sample. METHODS: Our sample included families with children aged 0 to 17 years whose family was interviewed about their health care expenditures in 1 of 7 panels of the 2001 to 2008 Medial Expenditure Panel Survey (N = 14 138). Financial burden was defined as (1) the sum of out-of-pocket health service expenditures during the first survey year and (2) that sum divided by adjusted family income. Delayed or forgone care was defined as self-report of delayed or forgone medical care or prescription medications for the reference parent or child during the second survey year. RESULTS: Financial burden, discordant insurance, and having a child with an activity limitation were some of the strongest predictors of delayed or forgone care. Additionally, significant health insurance and income-related disparities exist in the experience of delayed or forgone care. CONCLUSIONS: Children and their families are delaying or forgoing needed care due to health care–related financial burden. Policies are needed to effectively reduce financial burden and improve the concordance of insurance between parents and children because this may reduce the frequency of unmet need among families. Moreover, reducing the occurrence of delayed or forgone care may improve health outcomes by increasing the opportunity to receive timely and preventive care.

Preterm Birth in the United States: The Impact of Stressful Life Events Prior to Conception and Maternal Age

OBJECTIVES We determined whether and to what extent a womans exposure to stressful life events prior to conception (PSLEs) was associated with preterm birth and whether maternal age modified this relationship. METHODS We examined 9350 mothers and infants participating in the first wave of the Early Childhood Longitudinal Study, Birth Cohort, a nationally representative sample of US women and children born in 2001, to investigate the impact of PSLEs on preterm birth in the United States. We estimated the effect of exposure on preterm birth with weighted logistic regression, adjusting for maternal sociodemographic and health factors and stress during pregnancy. RESULTS Of the women examined, 10.9% had a preterm birth. In adjusted analyses, women aged 15 to 19 years who experienced any PSLE had over a 4-fold increased risk for having a preterm birth. This association differed on the basis of the timing of the PSLE. CONCLUSIONS Findings suggest that adolescence may be a sensitive period for the risk of preterm birth among adolescents exposed to PSLEs. Clinical, programmatic, and policy interventions should address upstream PSLEs, especially for adolescents, to reduce the prevalence of preterm birth and improve maternal and child health.

Preconception Mental Health Predicts Pregnancy Complications and Adverse Birth Outcomes: A National Population-Based Study

Pregnancy complications and poor birth outcomes can affect the survival and long-term health of children. The preconception period represents an opportunity to intervene and improve outcomes; however little is known about women’s mental health prior to pregnancy as a predictor of such outcomes. We sought to determine if and to what extent women’s preconception mental health status impacted subsequent pregnancy complications, non-live birth, and birth weight using a nationally representative, population-based sample. We used pooled 1996–2006 data from the nationally-representative Medical Expenditure Panel Survey (MEPS). Poor preconception mental health was defined as women’s global mental health rating of “fair” or “poor” before conception. Logistic regression was used to assess the association between preconception mental health and pregnancy complications, non-live birth, and having a low birth weight baby within the follow up period. Poor preconception mental health was associated with increased odds of experiencing any pregnancy complication (AOR 1.40, 95% CI: 1.02–1.92), having a non-live birth (AOR 1.48, 95% CI: 0.96–2.27), and having a low birth weight baby (AOR 1.99, 95% CI: 1.00–3.98), all controlling for maternal age, race/ethnicity, marital status, education, health insurance status, income, and number of children in the household. Significant racial and ethnic disparities exist for pregnancy complications and non-live births, but not for low birth weight. Women’s preconception mental health is a modifiable risk factor that stands to reduce the incidence of adverse pregnancy complications and birth outcomes.

The prevalence and determinants of antepartum mental health problems among women in the USA: a nationally representative population-based study

Mental health problems disproportionately affect women, particularly during childbearing years. We sought to estimate the prevalence of antepartum mental health problems and determine potential risk factors in a representative USA population. We examined data on 3,051 pregnant women from 11 panels of the 1996–2006 Medical Expenditure Panel Survey. Poor antepartum mental health was defined by self report of mental health conditions or symptoms or a mental health rating of “fair” or “poor.” Multivariate regression analyses modeled the odds of poor antepartum mental health; 7.8% of women reported poor antepartum mental health. A history of mental health problems increased the odds of poor antepartum mental health by a factor of 8.45 (95% CI, 6.01–11.88). Multivariate analyses were stratified by history of mental health problems. Significant factors among both groups included never being married and self-reported fair/poor health status. This study identifies key risk factors associated with antepartum mental health problems in a nationally representative sample of pregnant women. Women with low social support, in poor health, or with a history of poor mental health are at an increased risk of having antepartum mental health problems. Understanding these risk factors is critical to improve the long-term health of women and their children.