Dataset Information

Effects of different invitation strategies on participation in a cohort study of Iranian public sector employees: a cluster randomized trial.

ABSTRACT:

Background

Identifying strategies to optimize participation in health studies is one of the major concerns for researchers. The purpose of this study was to evaluate the efficiency of different invitation strategies on participation rate in the Employees' Health Cohort Study of Iran (EHCSIR).

Methods

Two cluster-randomized trials were carried out to assess the outcomes of different invitation strategies. In the first phase, 7 units with 1880 employees (3 hospitals, 3 health centers, and 1 office) were assigned to the three parallel modes of invitation: 1) invitation letter, 2) phone call and 3) Short Message Service (SMS). In the second phase, 6 hospitals with 1633 employees were allocated to two invitation methods: 1) invitation letter, 2) invitation letter plus EHCSIR project introduction video. All groups were followed up by phone calls. A logistic mixed-effects model was used to compare the effectiveness of the strategies. The cost-effectiveness of the interventions was also compared.

Results

In the first phase, the participation rates in the invitation letter, phone call, and SMS groups were 27.04% (182/673), 21.55% (131/608), and 22.54% (135/599), respectively. Using an invitation letter was significantly more successful than SMS (Adjusted Odds Ratio = 1.80, 95% CI =1.14 to 2.85). Average Cost-Effectiveness Ratios (ACER) were $1.37, $1.42, and $1.55 for the invitation letter, phone call, and SMS, respectively. In the second phase, adding a project introduction video to the invitation letter did not significantly influence the participation rate (Adjusted OR = 0.58, 95% CI =0.24 to 1.36). The ACER was $1.21 for the invitation letter only and $2.01 for the invitation letter plus the introduction video.

Conclusions

In comparison with the phone call and SMS, the invitation letter is the most effective invitation method for public sector employees to participate in a cohort study. Sending an introduction video did not significantly increase the participation rate compared to sending an invitation letter only.

SUBMITTER: Rajabzadeh R

PROVIDER: S-EPMC8502307 | biostudies-literature | 2021 Oct

REPOSITORIES: biostudies-literature

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Publications

Effects of different invitation strategies on participation in a cohort study of Iranian public sector employees: a cluster randomized trial.

Rajabzadeh Rezvan R Janani Leila L Janani Leila L Motevalian Seyed Abbas SA

BMC medical research methodology 20211009 1

<h4>Background</h4>Identifying strategies to optimize participation in health studies is one of the major concerns for researchers. The purpose of this study was to evaluate the efficiency of different invitation strategies on participation rate in the Employees' Health Cohort Study of Iran (EHCSIR).<h4>Methods</h4>Two cluster-randomized trials were carried out to assess the outcomes of different invitation strategies. In the first phase, 7 units with 1880 employees (3 hospitals, 3 health center ...[more]

PMID: 34627145

Similar Datasets

Project description:ObjectivesTo develop a risk prediction algorithm for identifying work units with increased risk of violence in the workplace.DesignProspective cohort study.SettingPublic sector employees in Finland.Participants18 540 nurses, social and youth workers, and teachers from 4276 work units who completed a survey on work characteristics, including prevalence and frequency of workplace violence/threat of violence at baseline in 2018-2019 and at follow-up in 2020-2021. Those who reported daily or weekly exposure to violence or threat of violence daily at baseline were excluded.ExposuresMean scores of responses to 87 survey items at baseline were calculated for each work unit, and those scores were then assigned to each employee within that work unit. The scores measured sociodemographic characteristics and work characteristics of the work unit.Primary outcome measureIncrease in workplace violence between baseline and follow-up (0=no increase, 1=increase).ResultsA total of 7% (323/4487) of the registered nurses, 15% (457/3109) of the practical nurses, 5% of the social and youth workers (162/3442) and 5% of the teachers (360/7502) reported more frequent violence/threat of violence at follow-up than at baseline. The area under the curve values estimating the prediction accuracy of the prediction models were 0.72 for social and youth workers, 0.67 for nurses, and 0.63 for teachers. The risk prediction model for registered nurses included five work unit characteristics associated with more frequent violence at follow-up. The model for practical nurses included six characteristics, the model for social and youth workers seven characteristics and the model for teachers included four characteristics statistically significantly associated with higher likelihood of increased violence.ConclusionsThe generated risk prediction models identified employees working in work units with high likelihood of future workplace violence with reasonable accuracy. These survey-based algorithms can be used to target interventions to prevent workplace violence.

Dataset Information

Effects of different invitation strategies on participation in a cohort study of Iranian public sector employees: a cluster randomized trial.

Background

Methods

Results

Conclusions

Publications

Effects of different invitation strategies on participation in a cohort study of Iranian public sector employees: a cluster randomized trial.

Similar Datasets

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