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Table 1 Sentiment analysis for reviews of Viagra, Levothyroxine, Oseltamivir and Apixaban

From: Machine learning in medicine: a practical introduction to natural language processing

Drug Number of positive sentiments Number of negative sentiments Percentage of sentiments classified as positive
Viagra 3 6 33%
Levothyroxine 7 16 30%
Oseltamivir 3 44 6%
Apixaban 0 2 0%