OBJECTIVE To evaluate the effect of opt-in compared with opt-out recruitment strategies on response rate and selection bias. DESIGN Double blind randomised controlled trial. SETTING Two general practices in England. PARTICIPANTS 510 patients with angina. INTERVENTION Patients were randomly allocated to an opt-in (asked to actively signal willingness to participate in research) or opt-ou...

Employment Options for F-1 Students Comparison of F-1 Employment Options [1] ● F-1 Employment with an International Organization [2] ● On-Campus Employment for F-1/J-1 Students [3] ● Employment and Volunteering [4] ● Severe Economic Hardship Employment for F-1 Students [5] ● CPT for F-1 Students [6] ● CPT Online Certification Course [7] ❍ CPT Online Review Course [8] ❍ OPT for F-1 Students [9] ...

Employment Options for F-1 Students Comparison of F-1 Employment Options [1] ● F-1 Employment with an International Organization [2] ● On-Campus Employment for F-1/J-1 Students [3] ● Employment and Volunteering [4] ● Severe Economic Hardship Employment for F-1 Students [5] ● CPT for F-1 Students [6] ● CPT Online Certification Course [7] ❍ OPT for F-1 Students [8] ● Applying for Optional Practic...

Employment Options for F-1 Students Comparison of F-1 Employment Options [1] ● F-1 Employment with an International Organization [2] ● On-Campus Employment for F-1/J-1 Students [3] ● Employment and Volunteering [4] ● Severe Economic Hardship Employment for F-1 Students [5] ● CPT for F-1 Students [6] ● CPT Online Certification Course [7] ❍ OPT for F-1 Students [8] ● Applying for Optional Practic...

Employment Options for F-1 Students Comparison of F-1 Employment Options [1] ● F-1 Employment with an International Organization [2] ● On-Campus Employment for F-1/J-1 Students [3] ● Employment and Volunteering [4] ● Severe Economic Hardship Employment for F-1 Students [5] ● CPT for F-1 Students [6] ● CPT Online Certification Course [7] ❍ CPT Online Review Course [8] ❍ OPT for F-1 Students [9] ...

Employment Options for F-1 Students Comparison of F-1 Employment Options [1] ● F-1 Employment with an International Organization [2] ● On-Campus Employment for F-1/J-1 Students [3] ● Employment and Volunteering [4] ● Severe Economic Hardship Employment for F-1 Students [5] ● CPT for F-1 Students [6] ● CPT Online Certification Course [7] ❍ OPT for F-1 Students [8] ● Applying for Optional Practic...

Employment Options for F-1 Students Comparison of F-1 Employment Options [1] ● F-1 Employment with an International Organization [2] ● On-Campus Employment for F-1/J-1 Students [3] ● Employment and Volunteering [4] ● Severe Economic Hardship Employment for F-1 Students [5] ● CPT for F-1 Students [6] ● CPT Online Certification Course [7] ❍ CPT Online Review Course [8] ❍ OPT for F-1 Students [9] ...

Employment Options for F-1 Students Comparison of F-1 Employment Options [1] ● F-1 Employment with an International Organization [2] ● On-Campus Employment for F-1/J-1 Students [3] ● Employment and Volunteering [4] ● Severe Economic Hardship Employment for F-1 Students [5] ● CPT for F-1 Students [6] ● CPT Online Certification Course [7] ❍ CPT Online Review Course [8] ❍ OPT for F-1 Students [9] ...

Employment Options for F-1 Students Comparison of F-1 Employment Options [1] ● F-1 Employment with an International Organization [2] ● On-Campus Employment for F-1/J-1 Students [3] ● Employment and Volunteering [4] ● Severe Economic Hardship Employment for F-1 Students [5] ● CPT for F-1 Students [6] ● CPT Online Certification Course [7] ❍ CPT Online Review Course [8] ❍ OPT for F-1 Students [9] ...