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Table 2 Mean date of NPI announcement with state case prevalence quartile on day of announcement

From: Survival analysis of factors affecting the timing of COVID-19 non-pharmaceutical interventions by U.S. universities

Case prevalence quartile

Move online

Cancel travel

Campus housing

Close campus

Remote work

Mean date NPI announced | Variance in days

 Q1

Mar-11 | 1

Mar-06 | 3

Mar-11 | 1

Mar-16 | 2

Mar-14 | 2

 Q2

Mar-11 | 1

Mar-10 | 2

Mar-12 | 2

Mar-19 | 3

Mar-15 | 2

 Q3

Mar-12 | 2

Mar-11 | 2

Mar-15 | 3

Mar-20 | 3

Mar-16 | 3

 Q4

Mar-11 | 2

Mar-13 | 4

Mar-17 | 3

Mar-21 | 4

Mar-17 | 4

Total

Mar-11 | 2

Mar-10 | 4

Mar-14 | 3

Mar-19 | 4

Mar-15 | 3

Number of positive cases in state on day of decision | Variance in cases

 Q1

3 | 2

0 | 0

4 | 3

32 | 18

150 | 327

 Q2

12 | 4

5 | 2

20 | 5

157 | 63

451 | 1189

 Q3

37 | 19

21 | 8

72 | 42

471 | 126

748 | 2048

 Q4

339 | 382

800 | 1746

1633 | 4031

3561 | 4322

2853 | 4118

Total

97 | 236

206 | 934

430 | 2122

1042 | 2586

1052 | 2602