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Table 2 Marginal effects of policy phases

From: The prevalence of insomnia in different COVID-19 policy phases: Longitudinal evidence from ITA.LI – Italian Lives

 

Marginal effect

SE

Unadjusted p-value

Unadjusted groups

Bonferroni p-value

Bonferroni groups

Insomnia: “not at all”

 Policy phase

  Phase 1

-0.301

0.042

0.000

-

-

-

  Phase 2

-0.355

0.036

0.000

-

-

-

  Phase 3

-0.128

0.024

0.000

-

-

-

 Policy phase x Age group

  Phase 1 x 16–34

-0.486

0.103

0.000

A

0.000

A

  Phase 1 x 35–54

-0.318

0.053

0.000

AB

0.000

AB

  Phase 1 x 55 or more

-0.173

0.063

0.006

B

0.017

B

  Phase 2 x 16–34

-0.487

0.088

0.000

A

0.000

A

  Phase 2 x 35–54

-0.335

0.050

0.000

A

0.000

A

  Phase 2 x 55 or more

-0.291

0.051

0.000

A

0.000

A

  Phase 3 x 16–34

-0.269

0.060

0.000

A

0.000

A

  Phase 3 x 35–54

-0.163

0.039

0.000

AB

0.000

AB

  Phase 3 x 55 or more

-0.064

0.035

0.068

B

0.203

B

Insomnia: “somewhat”

 Policy phase

  Phase 1

0.159

0.017

0.000

-

-

-

  Phase 2

0.168

0.015

0.000

-

-

-

  Phase 3

0.084

0.016

0.000

-

-

-

 Policy phase x Age group

  Phase 1 x 16–34

0.325

0.038

0.000

 

0.000

 

  Phase 1 x 35–54

0.176

0.025

0.000

 

0.000

 

  Phase 1 x 55 or more

0.084

0.024

0.000

 

0.001

 

  Phase 2 x 16–34

0.325

0.039

0.000

 

0.000

 

  Phase 2 x 35–54

0.180

0.023

0.000

 

0.000

 

  Phase 2 x 55 or more

0.100

0.023

0.000

 

0.000

 

  Phase 3 x 16–34

0.210

0.042

0.000

 

0.000

B

  Phase 3 x 35–54

0.108

0.025

0.000

 

0.000

AB

  Phase 3 x 55 or more

0.036

0.020

0.064

 

0.191

A

Insomnia: “very much”

 Policy phase

  Phase 1

0.142

0.030

0.000

-

-

-

  Phase 2

0.187

0.030

0.000

-

-

-

  Phase 3

0.045

0.010

0.000

-

-

-

 Policy phase x Age group

  Phase 1 x 16–34

0.161

0.072

0.025

A

0.075

A

  Phase 1 x 35–54

0.142

0.034

0.000

A

0.000

A

  Phase 1 x 55 or more

0.090

0.041

0.030

A

0.091

A

  Phase 2 x 16–34

0.162

0.056

0.004

A

0.011

A

  Phase 2 x 35–54

0.155

0.037

0.000

A

0.000

A

  Phase 2 x 55 or more

0.191

0.050

0.000

A

0.000

A

  Phase 3 x 16–34

0.059

0.020

0.002

A

0.007

A

  Phase 3 x 35–54

0.055

0.015

0.000

A

0.001

A

  Phase 3 x 55 or more

0.027

0.016

0.079

A

0.238

A

  1. This table reports discrete changes in respondents’ probability of experiencing no, moderate or severe insomnia at different policy phases (compared to the pre-pandemic baseline). Estimates sharing the same letter in the same phase-related group are not significantly different at the 5% level