scholarly journals Estimation of Domain Means from Business Surveys in the Presence of Stratum Jumpers and Nonresponse

2021 ◽  
Vol 37 (4) ◽  
pp. 1059-1078
Author(s):  
Mengxuan Xu ◽  
Victoria Landsman ◽  
Barry I. Graubard
Keyword(s):  
Variance Estimation ◽  
Response Rate ◽  
Bootstrap Method ◽  
High Response Rate ◽  
Ratio Estimator ◽  
Sampling Distributions ◽  
Satisfactory Performance ◽  
Extreme Variation ◽  
Ratio Estimators ◽  
Business Survey

Abstract Misclassified frame records (also called stratum jumpers) and low response rates are characteristic for business surveys. In the context of estimation of the domain parameters, jumpers may contribute to extreme variation in sample weights and skewed sampling distributions of the estimators, especially for domains with a small number of observations. There is limited literature about the extent to which these problems may affect the performance of the ratio estimators with nonresponse-adjusted weights. To address this gap, we designed a simulation study to explore the properties of the Horvitz-Thompson type ratio estimators, with and without smoothing of the weights, under different scenarios. The ratio estimator with propensity-adjusted weights showed satisfactory performance in all scenarios with a high response rate. For scenarios with a low response rate, the performance of this estimator improved with an increase in the proportion of jumpers in the domain. The smoothed estimators that we studied performed well in scenarios with non-informative weights, but can become markedly biased when the weights are informative, irrespective of response rate. We also studied the performance of the ’doubled half’ bootstrap method for variance estimation. We illustrated an application of the methods in a real business survey.

scholarly journals Paper, E-mail, or Both? Effects of Contact Mode on Participation in a Web Survey of Establishments

2018 ◽  
Vol 37 (6) ◽  
pp. 750-765 ◽  
Author(s):  
Joseph W. Sakshaug ◽  
Basha Vicari ◽  
Mick P. Couper
Keyword(s):  
Response Rate ◽  
Population Based ◽  
High Response Rate ◽  
Nonresponse Bias ◽  
Web Survey ◽  
Participation Rates ◽  
Web Surveys ◽  
Contact Mode ◽  
Mail Address ◽  
E Mail

Identifying strategies that maximize participation rates in population-based web surveys is of critical interest to survey researchers. While much of this interest has focused on surveys of persons and households, there is a growing interest in surveys of establishments. However, there is a lack of experimental evidence on strategies for optimizing participation rates in web surveys of establishments. To address this research gap, we conducted a contact mode experiment in which establishments selected to participate in a web survey were randomized to receive the survey invitation with login details and subsequent reminder using a fully crossed sequence of paper and e-mail contacts. We find that a paper invitation followed by a paper reminder achieves the highest response rate and smallest aggregate nonresponse bias across all-possible paper/e-mail contact sequences, but a close runner-up was the e-mail invitation and paper reminder sequence which achieved a similarly high response rate and low aggregate nonresponse bias at about half the per-respondent cost. Following up undeliverable e-mail invitations with supplementary paper contacts yielded further reductions in nonresponse bias and costs. Finally, for establishments without an available e-mail address, we show that enclosing an e-mail address request form with a prenotification letter is not effective from a response rate, nonresponse bias, and cost perspective.

scholarly journals Characteristics and treatment outcomes of patients with primary ocular adnexal lymphoma in Northern Thailand

2020 ◽  
Vol 17 (1) ◽  
pp. 86-97
Author(s):  
Kasem Seresirikachorn ◽  
Sakarin Ausayakhun ◽  
Damrong Wiwatwongwana ◽  
Ponsak Mahanupab ◽  
Teerada Daroontum ◽  
...  
Keyword(s):  
Treatment Outcomes ◽  
Response Rate ◽  
Stage Iv ◽  
High Response Rate ◽  
University Hospital ◽  
Treatment Modalities ◽  
Low Grade ◽  
Northern Thailand ◽  
Ocular Adnexal Lymphoma ◽  
Operative Notes

Purpose: To assess the characteristics and treatment outcomes of patients with primary ocular adnexal lymphoma (OAL) in Northern Thailand. Design: Retrospective cohort study. Methods: Data was collected from electronic medical records and operative notes from Chiang Mai University Hospital between January 2009 and December 2014. All available tissue biopsies of 54 patients were reviewed by agreement of two pathologists. The clinical characteristics and treatment outcomes were collected and analyzed. Results: A total number of 54 patients were identified of which 57.4% were female. The median age was 61.0 years (range, 4-86). The most common subtype of lymphoma was extranodal marginal zone lymphoma (ENMZL) of mucosa-associated lymphoid tissue (MALT) (n = 46, 85.2%). Seventy-five percent of the patients presented with a mass at the ocular adnexa, while 14.8% of the patients presented with proptosis. The sites of origin were as follows: lacrimal (46.3%), orbit (31.5%), conjunctiva (13%) and eyelid (7.4%). Two-thirds of the patients had Ann-Arbor Stage I, while 22% of patients had Stage IV. The majority of the patients (68.1%) had a low-risk international prognosis index (IPI). Treatment modalities involved field radiation (IFRT, 50%), chemotherapy (31.6%), combined chemoradiotherapy (7.9%) and surgical resection (10.5%). The overall response rate was 100% with a complete response rate of 77.8%. In patients with low-grade lymphoma, including MALT lymphoma, the 3-year progression-free survival (PFS) and overall survival were 69.9% and 92.5%, respectively. Conclusion: ENMZL of MALT was the major subtype of primary OAL. Radiotherapy was an effective treatment for the lower stages of disease providing a high response rate and encouraging survival outcomes.

scholarly journals Waning Humoral Response 3 to 6 Months after Vaccination with the SARS-COV-2 BNT162b2 mRNA Vaccine in Dialysis Patients

2021 ◽  
Vol 11 (1) ◽  
pp. 64
Author(s):  
Noa Berar-Yanay ◽  
Sarit Freiman ◽  
Maʹanit Shapira ◽  
Amer Saffoury ◽  
Ameer Elemy ◽  
...  
Keyword(s):  
Response Rate ◽  
Vaccine Dose ◽  
Humoral Response ◽  
Albumin Level ◽  
High Response Rate ◽  
Control Group ◽  
Dialysis Patients ◽  
Serious Adverse Events ◽  
Antibody Levels

Background and objectives: The short-term reported antibody response to SARS-COV-2 vaccination in dialysis patients is high, with a seroconversion response rate up to 97%. Data on the long-term durability of this response are scarce. Our objective was to characterize the long-term anti-spike antibody level in dialysis patients. Design, setting, participants, and measurements: In an observational study, we measured SARS-COV-2 anti-spike antibody levels in dialysis patients who completed 2 doses of the BNT162b2 mRNA SAR S-COV-2 vaccine at 1, 3 and 6 months after the second vaccine dose. We compared the response to dialysis patients who were infected with COVD-19 and to a control group of healthcare-employees. Results: One hundred and forty-two dialysis patients who had been vaccinated (ages 64 ± 11.9 years, 61% male), 33 dialysis patients who had COVID-19 infection (ages 54 ± 14.3 years, 55% male) and 104 individuals in the control group (ages 50 ± 12.2 years, 44% male) were included. The response rate in the vaccinated dialysis patients was 94%, 78% and 73% at 1, 3 and 6 months after the second vaccine dose. In the COVID-19 infected dialysis group and in the control group, the response rate remained at 100% over 6 months. The percentage of change in antibody levels between one and 6 months was −66% in the vaccinated dialysis group, −28% in the control group (p < 0.001) and +48% in dialysis patients who had been infected with COVID-19 (p < 0.001). A non-responder status at 6 months was associated with a lower albumin level. No serious adverse events following vaccination were reported. In conclusion: the initially high response rate to the BNT162b2 vaccine in dialysis patients decreases rapidly. Our results indicate that an early booster (3rd) dose, at three months after the second dose, may be advised for this population to preserve the humoral immunity.

scholarly journals Temporal Considerations for Self-Report Research Using Short Message Service

2016 ◽  
Vol 28 (4) ◽  
pp. 200-206 ◽  
Author(s):  
Erin Walsh ◽  
Jay K. Brinker
Keyword(s):  
Repeated Measures ◽  
Short Message Service ◽  
Response Rate ◽  
Time Of Day ◽  
High Response Rate ◽  
Self Report ◽  
Short Message ◽  
Significant Difference ◽  
Message Service ◽  
Working Day

Abstract. When using Short Message Service (SMS) as a tool for data collection in psychological research, participants can be contacted at any time. This study examined how sampling frequency and time of day of contact impacted on response rates, response completeness, and response delay in repeated measures data collected via SMS. Eighty-five undergraduate students completed a six-item self-report questionnaire via SMS, in response to 20 SMS prompts sent on a random schedule. One group responded across 2 days, the other on a compressed schedule of 1 day. Overall, there was a high response rate. There was no significant difference in response rate, completeness, and delay of those responding across 1 or 2 days. Timing between prompts did not impact on response behavior. Responses were more likely to be complete if prompts were sent during the working day. The shortest time between prompts was 15 min, however, and use of an undergraduate sample limits generalizability. When conducting repeated measures sampling using SMS, researchers should be aware that more frequent sampling can be associated with poorer data quality, and should aim to collect data during the working day rather than mornings or evenings.

scholarly journals The effect of a web-push survey on physician survey response rates: a randomized experiment.

2019 ◽  
Author(s):  
Cristine D. Delnevo ◽  
Binu Singh
Keyword(s):  
Survey Methodology ◽  
Response Rate ◽  
Mail Survey ◽  
Cost Effective ◽  
Response Rates ◽  
National Sample ◽  
High Response Rate ◽  
Future Research ◽  
Effective Delivery ◽  
The Web

Abstract Background: Achieving a high response rate for physicians has been challenging and with response rates declining in recent years, innovative methods are needed to increase rates. An emerging concept in survey methodology has been web-push survey delivery. In this delivery method, contact is made by mail to request a response by web. This study explored the feasibility of a web-push survey on a national sample of physicians. Methods: 1000 physicians across six specialties were randomly assigned to a mail only or web-push survey delivery. Each mode consisted of four contacts including an initial mailing, reminder postcard, and two additional follow-ups. Response rates were calculated using AAPOR’s response rate 3 calculation. Data collection occurred between Febuary – April 2018 and analyzed March 2019. Results: Overall reponse rates for the mail only vs. web-push survey delivery were comparable (51.2% vs. 52.8%). Higher response rates across all demographics were seen in the web-push delivery with the exception of pulmonary/critical care and physicians over the age of 65. The web-push survey yielded a greater response after the first mailing requiring fewer follow-up contacts resulting in a more cost-effective delivery. Conclusions: A web-push mail survey is effective in achieveing a comparable response rate to traditional mail only delivery for physicians. The web-push survey was more efficient in terms of cost and in receiving responses in a more timely manner. Future research should explore the efficiency of a web-push survey delivery across various health care provider populations.

A Follow-up Investigation with High Response Rate

1988 ◽  
Vol 16 (3) ◽  
pp. 137-137
Author(s):  
Henrik Toft Sørensen ◽  
Bo Christensen ◽  
Erling Kjærulff
Keyword(s):  
Response Rate ◽  
High Response Rate ◽  
High Response

Vinblastine fails to improve response of renal cancer to interferon alfa-n1: high response rate in patients with pulmonary metastases.

1991 ◽  
Vol 9 (5) ◽  
pp. 832-836 ◽  
Author(s):  
J A Neidhart ◽  
S A Anderson ◽  
J E Harris ◽  
J J Rinehart ◽  
J Laszlo ◽  
...  
Keyword(s):  
Response Rate ◽  
Complete Response ◽  
High Response Rate ◽  
Interferon Alfa ◽  
Induction Treatment ◽  
Small Subset ◽  
Research Triangle ◽  
Significant Difference ◽  
To Receive ◽  
Better Than

One hundred sixty-five patients were randomized to receive either interferon alfa-n1 (Wellferon; Burroughs Wellcome Co, Research Triangle Park, NC) alone or with vinblastine. An initial six-cycle induction treatment consisted of interferon given at daily doses of 3, 5, 20, 20, and 20 x 10(6) U/m2 every 2 weeks. Vinblastine at a dose of 10 mg/m2 (later decreased to 5 mg/m2) was given on day 1 of alternate cycles. Toxicities were generally well tolerated. The overall response rate was 10% with no significant difference between treatment arms. Survival was also not significantly different for the arms. A small subset of patients (16) with metastases only to the lungs had a high complete response (CR) and partial response (PR) rate of 44%. Responses were durable, and overall survival of this group was much better than that of the other patients.

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