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. 2021 Aug 13;11(5):1073–1082. doi: 10.1007/s12553-021-00585-z

Table 2.

Description of the patient comments dataset

Time Period Number of Comments Number of Comments (without mixed labels) Number of Words (Unigrams + Bigrams)
Pre-COVID19 (12/10/2019–3/10/2020) 1,719 1,658 797
During COVID19 (3/11/2020–6/10/2020) 1,670 1,490 950
Post–COVID19 (6/11/2020–9/10/2020) 3,017 2,742 1,027
Total 6,406 5,890 2,774