Academic literature on the topic 'Surveylogistic'

SAS and other popular statistical packages provide support for survey data with sampling weights. For example, PROC MEANS and PROC LOGISTIC in SAS have their counterparts PROC SURVEYMEANS and PROC SURVEYLOGISTIC to facilitate analysis of data from complex survey studies. On the other hand, PROC MEANS and many other classic SAS procedures also provide an option for including weights and yield identical point estimates, but different standard errors (SEs), as their corresponding survey procedures. This paper takes an in-depth look at different types of weights and provides guidance on use of different SAS procedures.

This study aimed to observe the relationship between iodine nutrition status (dietary iodine intake and estimated iodine intake based on urinary iodine concentration (UIC)) and thyroid disease-related hormones. This study involved 6090 subjects >19 years old with valid UIC, assessed between 2013 and 2015 by the Korean National Health and Nutrition Examination Survey, using a stratified, multistage, clustered probability-sampling design. The estimated iodine intake in participants was measured using UIC and urine creatinine. To examine the effect of iodine intake on thyroid disease, the iodine intake was divided into Korean Dietary Reference Intakes groups, and logistic regression analysis was performed via the surveylogistic procedure to obtain odds ratios (ORs) and 95% confidence intervals (CIs). The estimated iodine intake showed a significant positive correlation with dietary iodine intake (r = 0.021, p < 0.001), UIC (r = 0.918, p < 0.001), and thyroid-stimulating hormone (TSH) (r = 0.043, p < 0.001), but a significant negative correlation with free thyroxine (FT4) (r = −0.037, p < 0.001). Additionally, as the estimated iodine intake increased, age, TSH, and UIC increased, but FT4 decreased (p for trend < 0.0001). The risk of thyroid disease was higher in the “≥tolerable upper intake level (UL ≥ 2400 µg/day)” group than in the “<estimated average requirement (EAR < 150 µg/day)” group in females (OR: 2.418; 95% CI: 1.010–5.787). Also, as iodine intake increased, the risk of thyroid disease increased (p for trend < 0.038).

Introduction Incisional hernias (IH) are iatrogenically created in 400 000 new patients annually. Without repair, IH-associated complications can result in major illness and death. The health disparities literature suggests that under-represented patients present more frequently with surgical emergencies. The health disparities associated with IH remain relatively unstudied. Methods Inpatient admission data were obtained from the Healthcare Cost and Utilization Project National Inpatient Sample for 2012-2014. Patients with IH International Classification of Diseases ninth revision were included. Analyses were completed using survey specific procedures (SAS v.9.4). Type of admission within groups was compared via Rao-Scott chi-square tests. The probability of an elective admission was modeled via SurveyLogistic Procedure. Results Of 39 296 cases, 38.5% IH admissions were urgent or emergent (nonelective). The proportion of nonelective admission was statistically higher ( P < .0001) in patients >65 (40.9%) and females (40.3%). Among insurance types, self-paying patients had the highest proportion of nonelective admissions (64.3%). Racial disparities remained significant after adjusting for age, sex, and insurance. Compared with white patients, the odds of an admission being nonelective were significantly higher for black (odds ratio [OR] [95% CI]: 1.65 [1.53-1.77]], Hispanic (OR [95% CI]: 1.39 [1.28-1.51]), and other (OR [95% CI]: 1.2 [1.06-1.37]) patients. Discussion These data show that multiple at-risk patient populations are significantly more likely to require urgent admission for IH-related complications. These include older, female, non-white, and uninsured patients. Systematic efforts to ameliorate these disparities should be developed.

Abstract Background Increasing retirement age is a pivotal issue in labour market reforms. This study analyses factors conditioning retirement intentions. Methods In SeniorWorkingLife, 11 444 employed workers ≥50 years replied to questions in random order about expected reasons for leaving and potential reasons for staying longer at the labour market. Respondents were stratified based on the Danish version of International Standard Classification of Occupations (ISCO). Representative estimates were produced using the SurveyFreq and SurveyLogistic procedures of SAS combined with model-assisted weights based on national registers. Results For ISCO groups 1–4 (seated work) main expected reasons for retiring were freedom to choose and desire for more leisure time, but many would consider staying longer if there were better possibilities for additional senior days, longer vacations and flexible working hours. For ISCO groups 5–9 (physical work), poor physical health and not being capable of doing the job were common expected reasons for retiring, but many would consider staying longer if the work were less physically demanding and there were more senior days. Possibility for pension was a general expected reason for retiring. Expected reasons differed to a less extent between genders than between ISCO groups, e.g. economic factors were more important for men and high work demands more important for women. Conclusion Different barriers and opportunities for prolonging working life exist across different occupational groups of the labour market—with most consistent differences between those with seated and physical work. Targeting these specifically seems opportune for policy makers and future interventions.

Background. Asthma and obesity are two common health problems in the pediatric population. Obesity is associated with several comorbidities which are of great consequence. Excess adipose tissue has been linked to asthma in a number of studies. However, little is known about childhood body mass index (BMI) trajectories and the development of asthma phenotypes. Objective. The current study aims to investigate the significance of BMI trajectories over childhood and the risk of asthma phenotypes. Methods. The current study is a prospective cohort of children aged 0-2 years who were followed every two years for eight years through cycles one to five in the National Longitudinal Survey of Children and Youths (NLSCY). Statistical analysis: a latent class growth modelling (LCGM) method was used to identify BMI trajectory patterns from cycles one to five. Multiple imputation (number of imputations=5) was carried out to impute children with missing values on height or weight information. Sampling weights and 1,000 bootstrap weights were used in SAS PROC SURVEYLOGISTIC to examine the association between BMI trajectory and asthma phenotypes (persistent or transient asthma) in a multivariate analysis. Results. The study consisted of 571,790 males and 549,230 females. Among them, 46% of children showed an increasing trajectory in terms of change in BMI percentile during childhood, followed by the stable-trajectory group (41%) and decreasing-trajectory group (13%). After controlling for confounding factors, females in the increasing BMI trajectory group were four times more likely to be associated with persistent asthma (OR = 4.09; 95% CI:1.04-16.15; p = 0.0442) than females in the stable BMI trajectory group. No such relationship was found in males. The BMI trajectory was not significantly associated with risk of transient asthma for either sex. Conclusion. We report a female-specific association between increasing adiposity, measured by BMI, and persistent asthma.

Labor market participation has a positive impact on social inclusion and is linked to financial security. This study identifies barriers and willingness to accept re-employment among unemployed seniors that could highlight opportunities for societal action. From the first wave of SeniorWorkingLife in 2018 combined with the Danish version of the International Standard Classification of Occupations register (ISCO), +50-year-old unemployed senior workers (n = 1682) were stratified into mainly seated work (ISCO 1–4) and mainly physical work (ISCO 5–9), respectively, in their latest employment. We used SurveyFreq and SurveyLogistics of SAS combined with model-assisted weights based on national registers to estimate representative frequencies and odds ratios (OR) for barriers and willingness to accept re-employment. Higher age was perceived as a general barrier for re-employment in both groups. Health was a more pronounced barrier for seniors with mainly physical work compared to seniors with mainly seated work (OR 2.35; CI95 1.31–4.21). Overall, seniors showed a large degree of flexibility and willingness to re-enter the labor market. Different barriers and willingness to accept re-employment exist among currently unemployed seniors. These results highlight the need for different approaches across occupational groups to help unemployed seniors back into the labor market.

Background: Thrombolytic therapy is widely accepted for persistent hypotension or shock due to acute pulmonary embolism (PE), with randomized and observational studies demonstrating earlier hemodynamic improvement and possible mortality benefit. The extent to which thrombolytic therapy is used in urban versus non-urban settings is unclear. Methods: We conducted a retrospective cohort study of 92,706 (unweighted) and 180,189 (weighted) admissions with primary diagnosis of PE, for patient aged 18 years and above, that occurred in 2016, at all general acute-care hospitals within the 27 states included in the Nationwide Readmissions Database (NRD). Admissions for primary PE diagnosis and their respective severity levels (minor, moderate, major, extreme) were identified using the All Patient Refined Diagnosis Related Groups. We identified systemic and catheter-directed thrombolytic use using ICD-10-PCS codes. Hospital locations were classified as metropolitan (population ≥50K), micropolitan (10K-50K), and noncore (&lt;10K). National estimates were calculated using post-stratification weights designed to compensate for any over- or under-represented hospital types in the NRD relative target universe of all hospitals in the U.S. PROC SURVEYFREQ and SURVEYLOGISTICS (SAS 9.4) were used to account for complex sampling design in variance calculations. Results: Of all primary PE admissions, 89.5% (95% CI, 88.7-90.2%) occurred at hospitals in metropolitan, 8.0% (95% CI, 7.3-8.7%) in micropolitan, and 2.6% (95% CI, 2.3-2.8%) in noncore areas. Rates of systemic thrombolytic use differed by location: 2.5% (95% CI, 2.3-2.6%) of admissions in metropolitan, 1.1% (95% CI, 0.7-1.4%) in micropolitan, and 0.1% (95% CI, 0-0.3%) in noncore areas (P&lt;.001 for block test; Figure 1). Rates of catheter-directed thrombolytic use also differed: 2.4% (95% CI, 2.1-2.8%) of admissions in metropolitan, 1.5% (95% CI, 0.5-2.5%) in micropolitan, and 0.1% (95% CI, 0-0.2%) in noncore areas (P&lt;.001 for block test). Differences persisted after adjusting for severity of illness for both approaches of thrombolysis (P&lt;.001 in each block test of hospital location). Of patients with highest severity (major and extreme), systemic thrombolysis occurred in 4.0% (95% CI, 3.7-4.3%) of admissions in metropolitan, 1.9% (95% CI, 1.2-2.6%) in micropolitan, and 0.5% (95% CI, 0-1.1%) in noncore hospitals. In this same population, catheter-directed thrombolysis occurred in 2.4% (95% CI, 2.1-2.8%) of admissions in metropolitan, 1.5% (95% CI 0.5-2.5%) in micropolitan, and 0.1% (95% CI, 0-0.2%) in noncore hospitals. Conclusion: There was significant variation in use of systemic and catheter-directed thrombolysis for pulmonary embolism by hospital location. Thrombolytic therapy was rarely reported among noncore hospitals and occurred at a substantially lower rate at micropolitan than at metropolitan hospitals even when adjusted for illness severity. Implications: Efforts should be directed to understand drivers of urban-rural differences in use of thrombolytic therapies (e.g., knowledge, experience, support, resources) to identify potential levers to increase appropriate use of thrombolytic therapy particularly at hospitals in smaller, non-metropolitan communities. Disclosures Rosovsky: Janssen Pharmaceuticals: Consultancy, Research Funding; Bristol-Myers Squibb: Research Funding; Dova Pharmaceuticals: Consultancy.

Abstract Background Anaemia and malaria are common and life-threatening diseases among preschool-aged children in many tropical and subtropical areas, and Malawi is no exception. Accordingly, this study aimed to examine the association of referral clinical malaria with anemia (hemoglobin [Hb] < 110 g/L) in preschool-aged children in Malawi. Methods Using cross-sectional data obtained from the 2015–2016 Malawi Micronutrient Survey (MNS), multivariate logistic regression models were constructed using surveylogistic to account for the complex survey design. Blood samples of 1051 children aged 6–59 months were evaluated for malaria (using rapid diagnostic test [RDT] – SD BIOLINE Malaria Ag P.f/Pan test histidine-rich protein (HRP-II)™), Hb (using HemoCue 301), α-1-acid glycoprotein (AGP), and serum ferritin biomarkers (using simple sandwich enzyme-linked immunosorbent assay technique, ELISA) and inherited blood disorders from dry blood samples (DBS) using polymerize chain reaction (PCR). Diagnosis of clinical malaria was made on the basis of fever and a positive rapid diagnostic test (RDT). Results Of the 1051 PSC analysed, 29% had anaemia while 24.4% had a referral to the hospital due to malaria. After adjustments for known confounders, PSC with a history of referral clinical malaria had increased odds of being anaemic (adjusted odds ratio [aOR] = 4.63, 95% confidence interval [CI]: 2.90–7.40), P < 0.0001. Conclusions This study found that clinical malaria increased the risk of anaemia in PSC. Thus, elimination of malaria-causing parasites from the PSC’s blood should be rapid and complete in order to prevent the progression of uncomplicated malaria to a chronic infection that can lead to the development of malaria-related anaemia.

Abstract Aim The purpose of this study was to identify factors related to socioeconomic differences in oral health behavior and oral symptom experience in Korean adolescents using the 2017 Korea Youth Risk Behavior Web-Based Survey(KYRBS). Methods From the national 2017 KYRBS, which was approved by the Research Ethics Review Committee of the Korea Centers for Disease Control and Prevention, 61,874 adolescents aged 12-18 years were selected as participants of the present study. Toothbrushing, gum bleeding and toothache experience were selected as dependent variables, and subjective socioeconomic status (SES) was used as a measure of SES. For statistical analysis, complex samples logistic regression analysis was performed using SAS 9.3 (PROC SURVEYLOGISTIC). Results The Odds Ratio (OR) for toothbrushing variable in the highest SES group was 1.78 (95% CI: 1.68-1.88). The OR for the bleeding gums in the lowest SES group was 1.28 (95% CI: 1.21-1.36). Academic factors accounted for 19% of socioeconomic differences in toothbrushing, and psychological factors accounted for 36-49% of socioeconomic differences in oral symptoms. Conclusions Adolescent oral health inequalities were associated with a variety of factors including health behaviors, psychological factors, family and academic factors. Thus, oral health promotion of adolescents can be achieved by integrating relevant factors, which can be effective when based on schools. Key messages Social gradient in oral health behavior and oral symptoms of Korean adolescents persist when adjusted for behavioural, psychosocial and material factors. Because oral health in adolescents is linked to overall health, health promotion can be achieved when oral health inequalities are integrated and mediated within the overall health domain.

Abstract Objectives The purpose of this analysis was to compare the association between adult snacking frequency and weight status and central adiposity across various definitions of a snack. Specifically, we investigated whether the definition of a snack alters the odds ratio (OR) of having overweight or obesity (OW/OB, BMI ≥ 25 kg/m2) by consumption frequency and the contribution to total daily energy intake. In addition, we compared the OR of waist circumference risk (WC ≥ 102 men; 88 cm women) and sagittal abdominal diameter risk (SAD ≥ 25 men and 24 cm women) with snacking frequency and contribution to total daily energy using three common snack definitions. Methods Anthropometric measurements, one 24HR dietary recall, and demographic information (sex, age, race and Hispanic origin, income, and smoking status) from U.S. adults (≥20y; n = 20,146) collected during NHANES 2013–2016 were used in this analysis. Snacking events were defined by one of three definitions: 1) events defined by the reporter as a “snack,” 2) any event outside of a typical meal time (i.e., breakfast, lunch, dinner, super, brunch), or 3) ingestion events that contribute <15% of total daily energy intake. PROC SURVEYLOGISTIC was used to calculate OR of elevated OW/OB, WC, and SAD with snacking frequency and % of energy contributed by snacks. One snack per day was used 5–15% of daily energy from snacks were used as reference values. Results Consumption of 3 or 4 snacks per day versus 1 snack per day was associated with decreased odds of OW/OB among women when a snack was defined as an event contributing <15% of today daily energy intake when controlled for demographic characteristics (OR, 95% CI = 0.64 (0.49, 0.84) and 0.72 (0.55, 0.94) for 3 and 4 snacks, respectively) but not when controlling for accuracy of energy intake reporting (0.75 (0.57, 0.99) and 0.93 (0.71, 1.22)). Snacking frequency was not associated with odds of OW/OB among women with any other snack definition. Snack frequency was not associated with odds of OW/OB for men regardless of snack definition. Conclusions The association between snacking frequency and weight status and central adiposity is inconsistent and varies by snack definition among men and women. Clarification of snack definition should be emphasized when examining effects of snacking patterns and obesity and health outcomes. Funding Sources NA

In this study I examine voter response at an interview level using a dataset of 7562 voter contacts (including responses and nonresponses) in the 2004 Utah Colleges Exit Poll. In 2004, 4908 of the 7562 voters approached responded to the exit poll for an overall response rate of 65 percent. Logistic regression is used to estimate factors that contribute to a success or failure of each interview attempt. This logistic regression model uses interviewer characteristics, voter characteristics (both respondents and nonrespondents), and exogenous factors as independent variables. Voter characteristics such as race, gender, and age are strongly associated with response. An interviewer's prior retail sales experience is associated with whether a voter will decide to respond to a questionnaire or not. The only exogenous factor that is associated with voter response is whether the interview occurred in the morning or afternoon.