“…RESULTS: Only two patients clearly understood the aim of placebo-controlled RCTs. Only one principal investigator said she asks all her patients whether they agree to participate in RCTs. …”
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“…Of 228 manuscripts submitted to scientific journals, 197(86%) were either published or in press; in 86%, the principal investigator (first author) was a LMIC national. …”
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“…Final publications were identified in MEDLINE and EMBASE by NCT numbers, or by querying the principal investigator. For trials not published, we surveyed the principal investigators to identify the reason for non-publication. …”
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“…Eleven RTs (8%) had received funding as a chief/principal investigator. Involvement in research was associated with a desire to make a career change. …”
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“…Disagreements that cannot be resolved by discussion between reviewers shall be arbitrated by the principal investigator. Data extraction will be performed using a pre-defined data extraction sheet. …”
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“…METHODS: This study consists of three steps. The Principal Investigator of each site and two site representatives who are knowledgeable of the intervention (e.g., study coordinator or the person delivering the intervention) will answer an online survey aiming to capture components of the interventions. …”
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“…Standardized pre-validated slide panels and questionnaire were distributed to laboratory professionals by the principal investigator. The panel slides were comprised of 5 positives and 3 negative blood films. …”
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“…PATIENTS AND METHODS: Designed as a quality improvement project using Standards for Quality Improvement Reporting Excellence (SQUIRE) guidelines, a diagnostic checklist was used by the principal investigator for 1 year in a tertiary referral dermatitis clinic for patients without a confirmed cause for the dermatitis after two to three visits with the investigator. …”
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“…Data were collected through face to face interview by four data collectors and they were supervised by the principal investigator during the entire period of data collection. …”
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“…Participants (n = 8) involved in the harmonisation meeting included the principal investigator, a linguistic expert, occupational therapists with knowledge of the target population, context and the DASH questionnaire and members of the target population with and without upper limb conditions. …”
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“…A pilot study conducted by the principal investigator to determine the feasibility of the study among 9 participants (4 experimental and 5 control) revealed that there was slight difference found in the incidence of oral complications among the group in relation to weeks of assessment. …”
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“…Neurologic clinical symptoms were acquired by the history taken by the principal investigator. More than one neurologic symptoms and Kang MRI grade 2 or 3 were taken as positive evidence of cord compression resulting from canal stenosis. …”
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“…Data extraction will be undertaken by the principal investigator. The primary analysis will focus on the availability and effectiveness of antenatal ultrasound for structural congenital anomalies. …”
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“…The five most important factors at centre level for enhancing recruitment were that the research question was important (97%), a simple procedure for providing information and gaining consent (92%), a highly engaged local principal investigator and research nurse (both 87%), and that study-related follow-ups are practically feasible and possible to coordinate with the clinical follow-up (87%). …”
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“…The time frame for making registry entries publicly available revealed a strong heterogeneity among respondents, with the largest proportion voting for “access only after consent by the principal investigator” and the second largest proportion voting for “access immediately after registration”. …”
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“…All measurements were done by the principal investigator. Non-parametric analyses were used for comparisons of the undercut values between the 3D printed and poured casts to determine the amount of elastic recovery of the irreversible hydrocolloid impression material. …”
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“…Students’ height (cm) and weight (kg) were measured to calculate BMI. The principal investigator performed the oral clinical examinations for the DMFT status in the dental clinic. …”
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“…The feasibility of recruitment, retention, intervention, and data collection procedures and the acceptability of exercise modality, hospital-based instruction, and home-based practice were collected by retrieving information from research documents and interviews by the principal investigator 4 weeks after the start of intervention. …”
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“…For each simulation session, one clinical simulation instructor, one cardiologist teacher, and the principal investigator participated. Students were divided into three groups (3-5 students) for each-session. …”
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“…Data were collected by a principal investigator with a predesigned, pretested, questionnaire by conducting face-to-face interview with the participants. …”
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