Cohesion and Clarity
12- 41
Not: The 5-year overall survival rate was higher in the high-dose group than in the low-dose group, however, this difference was not statistically significant. Correct: The 5-year overall survival rate was higher in the high-dose group than in the low- dose group; however, this difference was not statistically significant. Correct: The 5-year overall survival rate was higher in the high-dose group than in the low- dose group, but this difference was not statistically significant.
Do not use commas around restrictive clauses or phrases (restrictive clauses or phrases are essential to the meaning of the sentence):
Not: The only patient, who experienced a grade 4 toxic effect, was an 87-year-old woman. Correct: The only patient who experienced a grade 4 toxic effect was an 87-year-old woman. But: The patient, who was 87 years old, recovered from the toxic effects of the drug and was discharged from the hospital after 3 days. (The clause beginning with “who” is nonrestrictive.)
Correct: Researchers are investigating drugs that may inhibit angiogenesis.
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