Table 1.

Identified CTC clusters for containment and closure (CC)

CTC cluster ID	Noun phrases	Rank scores
CC1	“support mental health”, “physical mental”, “physical health”, “mental health”, “impact physical mental health”, “mental health social”, “impact physical”	4,609
CC2	“lockdown measure”, “implementation lockdown”, “northern”, “milan”, “lockdown”, “impact lockdown”, “impact lockdown measure”, “lombardy”, “northern italy”	4,488
CC3	“lockdown”, “self isolation”, “isolation”, “quarantine”, “isolation home”	2,608
CC4	“slowing”, “stopping”, “spread covid”, “public policy”, “slow spread”, “public health policy”, “spread”, “policy”, “health policy”	2,485
CC5	“social distancing”, “decision maker”, “distancing”, “social distancing isolation”, “stricter”, “distancing lockdown”, “social distancing lockdown”, “isolation social distancing”	2,464
CC6	“severe symptom”, “associated symptom”, “symptom anxiety depression”, “symptom”, “symptom pandemic”, “symptom anxiety”, “symptom depression anxiety”, “symptom depression”, “symptom time”	2,289
CC7	“student population”, “mental health student”, “student”, “college students”, “impact student”, “college student”, “health student”, “student reported”, “student mental health”	2,234