Increased risk of hospitalization among children who were HIV-exposed and uninfected compared to population controls.

Objectives: While studies have demonstrated increased morbidity and mortality risk in infancy among children who are HIV-exposed and uninfected (CHEU), longitudinal data are limited. The objective of this study was to assess long-term risk of hospitalization among CHEU compared to children who are HIV-unexposed and uninfected (CHUU), and determine risk factors for hospitalization among CHEU.

Design: A longitudinal cohort study (1988-2015) linking the Centre maternel et infantile sur le SIDA cohort (Montreal, Quebec) to administrative data from the Régie de l'assurance maladie du Québec (RAMQ), a universal health insurance provider in the province of Quebec.

The Effect of Age and Comorbidities: Children vs. Adults in Their Response to SARS-CoV-2 Infection.

While children have experienced less severe coronavirus disease (COVID-19) after SARS-CoV-2 infection than adults, the cause of this remains unclear. The objective of this study was to describe the humoral immune response to COVID-19 in child vs. adult household contacts, and to identify predictors of the response over time.

Antinuclear antibody-negative systemic sclerosis.

Objective: To examine the demographic and clinical characteristics of systemic sclerosis (SSc) patients without antinuclear antibodies (ANA) compared to ANA-positive patients.

Methods: SSc patients enrolled in the Scleroderma Family Registry and DNA Repository were included. Relevant demographic and clinical data were entered by participating sites or obtained by chart review.

Physical and occupational therapy referral and use among systemic sclerosis patients with impaired hand function: results from a Canadian national survey.

Objectives: Contractures and deformities of the hand are major factors in disability and reduced health-related quality of life in systemic sclerosis (SSc). Physical (PT) and occupational therapy (OT) have been emphasised to address impaired hand function, but little is known about the extent they are employed. The objective of this study was to determine the proportion of Canadian SSc patients with hand involvement who are referred to and use PT or OT services and factors associated with referral.

Anti-centromere antibodies in a large cohort of systemic sclerosis patients: comparison between immunofluorescence, CENP-A and CENP-B ELISA.

Introduction: Anti-centromere antibodies (ACA) are useful biomarkers in the diagnosis of systemic sclerosis (SSc) where they are found in 20-40% of patients and, albeit with lower prevalence, in patients with other systemic autoimmune rheumatic diseases. Historically, ACA were detected by indirect immunofluorescence (IIF) on HEp-2 cells and confirmed by immunoassays using recombinant CENP-B. During the last few years, to accommodate high throughput diagnostics, a number of laboratories changed from IIF to ELISA assays.

Frequency and impact of symptoms experienced by patients with systemic sclerosis: results from a Canadian National Survey.

Objective: Knowledge about the range of symptoms experienced by patients with SSc, and their impact on daily functioning is limited. The objective of the present study was to identify symptoms of SSc that patients rated as frequent and that highly impacted their ability to carry out daily activities.

Methods: A total of 464 persons with SSc responded to the Canadian Scleroderma Patient Survey of Health Concerns and Research Priorities, including questions regarding the frequency and impact of 69 SSc symptoms.

The association between disease activity and duration in systemic sclerosis.

Objective: The absence of a standardized disease activity index has been an important barrier in systemic sclerosis (SSc) research. We applied the newly derived Valentini Scleroderma Disease Activity Index (SDAI) among our cohort of patients with SSc to document changes in disease activity over time and to assess possible differences in activity between limited and diffuse disease.

Methods: Cross-sectional study of a national cohort of patients enrolled in the Canadian Scleroderma Research Group Registry.

Sociodemographic, disease, and symptom correlates of fatigue in systemic sclerosis: evidence from a sample of 659 Canadian Scleroderma Research Group Registry patients.

Objective: To assess fatigue levels and demographic, socioeconomic, disease, and psychosocial correlates of fatigue in patients with systemic sclerosis (SSc).

Methods: We conducted a cross-sectional, multicenter study of 659 patients with SSc from the Canadian Scleroderma Research Group Registry. Fatigue was assessed during annual Registry visits with the Short Form 36 (SF-36) health survey vitality subscale.

Symptoms of depression predict the trajectory of pain among patients with early inflammatory arthritis: a path analysis approach to assessing change.

Objective: To assess the longitudinal relationships, including directionality, among chronic pain, symptoms of depression, and disease activity in patients with early inflammatory arthritis (EIA).

Methods: One hundred eighty patients with EIA completed an examination, including swollen joint count, and were administered the Center for Epidemiological Studies Depression Scale (CES-D) and the McGill Pain Questionnaire (MPQ) at 2 timepoints 6 months apart. Cross-lagged panel path analysis was used to simultaneously assess concurrent and longitudinal relationships among pain, symptoms of depression, and number of swollen joints.

Prevalence and clinical correlates of symptoms of depression in patients with systemic sclerosis.

Objective: To assess the prevalence and predictors of symptoms of depression in a large sample of patients with systemic sclerosis (SSc).

Methods: We conducted a cross-sectional, multicenter study of 376 patients with SSc from the Canadian Scleroderma Research Group Registry. Patients were assessed with the Center for Epidemiologic Studies Depression Scale (CES-D) and through extensive clinical histories and medical examinations.

Patients with systemic autoimmune diseases could not distinguish comorbidities from their index disease.

Objective: To assess the construct validity of the Self-Administered Comorbidity Questionnaire (SCQ) in patients with systemic sclerosis (SSc) and systemic lupus erythematosus (SLE).

Methods: The SCQ was modified for the SSc cohort to emphasize the objective of recording problems other than the patients' scleroderma. It was administered to 406 SSc and 147 SLE patients.

High rates of depressive symptoms among patients with systemic sclerosis are not explained by differential reporting of somatic symptoms.

Objective: Between 36% and 65% of patients with systemic sclerosis (SSc) report symptoms of depression above cutoff thresholds on self-report questionnaires. The objective of this study was to assess whether these high rates result from differential reporting of somatic symptoms related to the high physical burden of SSc.

Methods: Symptom profiles reported on the Center for Epidemiologic Studies Depression Scale (CES-D) were compared between a multicenter sample of 403 patients with SSc and a sample of respondents to an Internet depression survey, matched on total CES-D score, age, race/ethnicity, and sex.

Reliability and validity of the center for epidemiologic studies depression scale in patients with systemic sclerosis.

Objective: Reported rates of depressive symptoms in patients with systemic sclerosis (SSc) are high. No depression assessment tools, however, have been validated for patients with SSc. Our objective was to assess the internal consistency reliability, convergent validity, and structural/construct validity of the Center for Epidemiologic Studies Depression Scale (CES-D) in patients with SSc.

Clinical correlates of quality of life in systemic sclerosis measured with the World Health Organization Disability Assessment Schedule II.

Objective: To identify the clinical characteristics of systemic sclerosis (SSc) that best correlate with the health-related quality of life (HRQOL) of patients with SSc, using the World Health Organization Disability Assessment Schedule II (WHODAS II) as the measure of HRQOL.

Methods: A cross-sectional, multicenter study of 337 patients from the Canadian Scleroderma Research Group Registry was conducted. Patients were assessed through detailed clinical histories, medical examination, and the WHODAS II.

Quality of life in systemic sclerosis: psychometric properties of the World Health Organization Disability Assessment Schedule II.

Objective: To determine the validity of the World Health Organization Disability Assessment Schedule II (WHODAS II) in systemic sclerosis (SSc).

Methods: Patients enrolled in the Canadian Scleroderma Research Group registry participated in a standardized evaluation and completed the WHODAS II. Criterion validity was assessed by comparing the WHODAS II with the Medical Outcomes Study Short Form 36 (SF-36), construct validity was assessed by examining how it relates to common measures of outcome in SSc, and discriminative validity was assessed by examining how it distinguishes patients with more severe disease from those with less severe disease.

Hypocomplementemia in systemic sclerosis--clinical and serological correlations.

Objective: Although complement fixation is not commonly thought to be part of the pathogenesis of systemic sclerosis (SSc), hypocomplementemia has been associated with SSc. We hypothesized that hypocomplementemia in SSc might indicate the presence of overlap disease. We investigated if SSc patients with hypocomplementemia had more features of overlap disease than those with normal complement levels.

Depression in patients with systemic sclerosis: a systematic review of the evidence.

Objective: To assess the prevalence, course, and predictors of depression in patients with systemic sclerosis (SSc).

Methods: We conducted a comprehensive search in November 2006 of MEDLINE, PsycINFO, and CINAHL databases to identify original research studies published in any language that used a structured interview or validated questionnaire to assess major depressive disorder or clinically significant symptoms of depression in patients with SSc. The search was augmented by hand searching 26 selected journals through December 2006 and references from identified articles and reviews.

The development of systemic sclerosis classification criteria.

Systemic sclerosis (SSc) is a rare connective tissue disorder whose aetiology remains obscure, although environmental and genetic influences are likely to play a role. Disease registries have contributed to enhancing our understanding of this debilitating illness, but without sensitive, specific, and extensively validated classification criteria, accurate comparison between registries and the identification of patients suitable for clinical trials can be problematic. The American College of Rheumatology (ACR) criteria, published in 1980, have become outdated as our understanding of disease specific autoantibodies and nailfold capillaroscopy has improved.

Office capillaroscopy in systemic sclerosis.

The aims of this study are to assess the reliability of two office techniques, the ophthalmoscope and the Dermlite dermatoscope, and to detect nailfold capillaroscopy abnormalities in systemic sclerosis (SSc). Two separate studies were performed. In the first, the nailfolds of two fingers on one hand of 13 SSc patients and two normals were examined by four rheumatologists using an ophthalmoscope.

Predictors of somatic symptoms in depressive disorder.

We explored the relative contribution of potential psychological predictors of somatic symptoms in outpatients with major depressive disorder, including; 1) severity of depression; 2) general anxiety; 3) hypochondriacal worry; 4) somatosensory amplification; and, 5) alexithymia by sampling 100 consecutive outpatients with DSM-IV diagnoses of major depressive disorder attending the psychiatry clinics of general hospitals in Turkey. The subjects were rated by clinicians on depressive symptomatology (Hamilton Depression Rating Scale), and anxiety (Hamilton Anxiety Scale), and completed self-report measures of Hypochondriacal worry (7-item version of the Whiteley Index), the Somatosensory Amplification Scale, and the Toronto Alexithymia Scale. Multivariate models tested the independent contribution of each of the scales to the level of somatic symptoms as measured by a modified version of the SCL-90 somatization scale.

Correlates of illness worry in chronic fatigue syndrome.

Background: Anxiety about illness leading to restriction of activity and physical deconditioning has been hypothesized to contribute to the chronicity of fatigue. Pathological symptom attributions, personality traits, and depression have all been hypothesized to contribute to illness worry.

Methods: We compared 45 chronic fatigue syndrome (CFS) and 40 multiple sclerosis (MS) outpatients using a battery of psychometric instruments comprising the 12-item Illness Worry scale, the Symptom Interpretation Questionnaire (SIQ), the NEO Five-Factor Inventory (NEO-FFI), and a modified version of the SCL-90R Depression scale.

Psychological correlates of functional status in chronic fatigue syndrome.

Background: The present study was designed to test a cognitive model of impairment in chronic fatigue syndrome (CFS) in which disability is a function of severity of fatigue and depressive symptoms, generalized somatic symptom attributions and generalized illness worry.

Methods: We compared 45 CFS and 40 multiple sclerosis (MS) outpatients on measures of functional ability, fatigue severity, depressive symptoms, somatic symptom attribution and illness worry.

Results: The results confirmed previous findings of lower levels of functional status and greater fatigue among CFS patients compared to a group of patients with MS.