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In a clinical trial, 780 participants suffering from high blood pressure were randomly assigned to one of three groups.Over a one-month period, the first group received a low
Dosage of an experimental drug, the second group received a high dosage of the drug, and the
Third group received a placebo.The diastolic blood pressure of each participant was
Measured at the beginning and at the end of the period and the change in blood pressure was
Recorded.Identify the factor in the experiment.
Park Ranger
A professional responsible for protecting and conserving parklands, ensuring the safety of visitors, and educating the public about natural and historical resources.
Pronoun
A word used to substitute for a noun or noun phrase, often to avoid repetition and manage coherence; examples include "he," "she," "it," "they."
Trophy
A physical representation, often an ornamental cup or statue, awarded as a prize for achievement in a competition or event.
Pronoun
A grammatical term referring to words that substitute for nouns or noun phrases, facilitating brevity and variety in speech and writing.
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