Analysis and Recognition of Food Safety Problems in Online Ordering Based on Reviews Text Mining

Table 2

List of theme-feature words of reviews text involving potential food safety hazards.

Theme number	Theme content	Feature words 1	Feature words 2	Feature words 3	Feature words 4	Feature words 5	Feature words 6	Feature words 7	Feature words 8
Theme 1	Causing physical discomfort	Upset stomach	Taste	Problem	Food poisoning	Nausea causing	Deliver	Seller	Vomit
Theme 2	Awful smell	Smell	Rancid taste	Negative review	Fishy smell	Bad smell	Weird	Ordering food	Stench
Theme 3	Mixed with foreign matters	Hair	Nausea	Unpalatable	Inside	Cockroach	Steel wire	Takeout food	Unexpectedly
Theme 4	Inadequate delivery	Dirty and messy	Hygiene	Cool	Fly	Really	Unpalatable	Greasy	Spilled
Theme 5	Food maturity is not appropriate	Very bad	Half-cooked	Deliver	Raw	Feel	Blood thread	Very hard	Paste flavor