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Table 3 Hazard ratios for NPI and explanatory variables

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

Survival analysis models with explanatory variables

Relative risk

(95% confidence interval)

P

Move Online

 Private / Public

0.79 (0.64:0.98)

0.031

 Democrat/Republican Governor

0.80 (0.73:0.88)

< 0.001

 Democrat/Republican Congressional House

0.64 (0.52:0.78)

< 0.001

 More / Less Diverse Faculty

0.76 (0.60:0.95)

0.017

 More / Less Diverse Students

1.09 (0.87:1.37)

0.466

 No/ Yes Health infrastructure

0.89 (0.72:1.09)

0.257

 Fewer/more foreign students

1.22 (1.02:1.46)

0.029

 City-Suburb / Town-Rural

0.92 (0.72:1.18)

0.517

 Enrollment < 20 k / > 20 k

1.25 (0.99:1.57)

0.059

 State Case Prevalence, Quartile 1

1

 

  Quartile 2

0.82 (0.64:1.05)

0.124

  Quartile 3

0.39 (0.30:0.50)

< 0.001

  Quartile 4

0.53 (0.40:0.69)

< 0.001

Campus Housing

 Private / Public

0.50 (0.38:0.65)

< 0.001

 Religious / Not Religious

1.26 (0.90:1.77)

0.171

 Democrat/Republican Congressional House

0.70 (0.57:0.86)

< 0.001

 No/ Yes Health infrastructure

0.99 (0.81:1.19)

0.879

 Fewer/more foreign students

0.94 (0.77:1.13)

0.495

 City-Suburb / Town-Rural

0.76 (0.58:1.00)

0.048

 State Case Prevalence, Quartile 1

1

 

  Quartile 2

0.54 (0.42:0.70)

< 0.001

  Quartile 3

0.22 (0.16:0.29)

< 0.001

  Quartile 4

0.11 (0.08:0.15)

< 0.001

Cancel Travel

 Private / Public

0.83 (0.67:1.03)

0.087

 Democrat/Republican Congressional House

0.61 (0.50:0.73)

< 0.001

 Fewer/more foreign students

1.00 (0.83:1.20)

0.994

 State Case Prevalence, Quartile 1

1

 

  Quartile 2

0.41 (0.32:0.53)

< 0.001

  Quartile 3

0.30 (0.23:0.39)

< 0.001

  Quartile 4

0.14 (0.10:0.18)

< 0.001

Campus Closed

 Religious / Not Religious

1.37 (1.03:1.82)

a0.032

 Democrat/Republican Governor

0.77 (0.70:0.85)

< 0.001

 Democrat/Republican Congressional House

0.67 (0.54:0.83)

< 0.001

 More / Less Diverse Faculty

0.65 (0.53:0.80)

< 0.001

 State Case Prevalence, Quartile 1

1

 

  Quartile 2

0.32 (0.25:0.42)

< 0.001

  Quartile 3

0.21 (0.16:0.27)

< 0.001

  Quartile 4

0.11 (0.08:0.16)

< 0.001

Remote Work

 Democrat/Republican Governor

0.68 (0.62:0.75)

< 0.001

 Democrat/Republican Congressional House

0.77 (0.62:0.94)

0.011

 More / Less Diverse Faculty

0.69 (0.54:0.88)

0.003

 More / Less Diverse Students

0.86 (0.67:1.10)

0.226

 No/ Yes Health infrastructure

0.89 (0.72:1.09)

0.262

 City-Suburb / Town-Rural

0.76 (0.58:0.99)

0.043

 Enrollment < 20 k / > 20 k

1.34 (1.07:1.67)

0.010

 State Case Prevalence, Quartile 1

1

 

  Quartile 2

0.52 (0.40:0.67)

< 0.001

  Quartile 3

0.25 (0.19:0.33)

< 0.001

  Quartile 4

0.16 (0.12:0.21)

< 0.001

  1. Statistically significant results in bold text
  2. aCampus closure, Religious / Not Religious was not statistically significant (p = 0.087) when adjusting for spring break as a time varying covariate