Table 2 Multivariable model describing the factors associated with duration of sick leave in the 4 months during the first wave of the COVID-19 pandemic, n = 8602

Intercept of the multivariable model

3.60 [0.03]

36.5 [34.3–38.9]

0.000

Diagnostic groups in the year before the COVID-19, Ref. No prior sick leave

 Mental, behavioural, and neurodevelopmental disorders

0.02 [0.03]

1.02 [0.96–1.08]

0.597

 Musculoskeletal system and connective tissue diseases

0.08 [0.03]

1.08 [1.01–1.15]

0.017

 Respiratory system diseases

0.20 [0.03]

1.22 [1.14–1.31]

 < 0.001

 All other isolated diagnoses

0.08 [0.03]

1.08 [1.03–1.14]

0.003

 Multiple diagnoses

0.26 [0.04]

1.30 [1.20–1.41]

 < 0.001

Education. Ref. primary school (≤ 9 years)

 Secondary school (10–12 years)

 − 0.05 [0.02]

0.95 [0.91–0.99]

0.007

 Short university education (13–14 years)

0.02 [0.02]

1.02 [0.97–1.07]

0.425

 Long university education (≥ 15 years)

0.03 [0.02]

1.03 [0.99–1.07]

0.143

Civil status. Ref. married

 Single

0.04 [0.01]

1.04 [1.01–1.06]

0.004

 Divorced

0.03 [0.02]

1.03 [1.00–1.06]

0.053

 Widow/widower

0.16 [0.05]

1.18 [1.07–1.30]

 < 0.001

Employment status. Ref. employed

 Self-employed

0.11 [0.04]

1.12 [1.03–1.21]

0.007

 Unemployed

 − 0.06 [0.05]

0.95 [0.86–1.05]

0.295

 Female sex

0.03 [0.01]

1.03 [1.01–1.06]

0.011

 Age, per gained year (range 18–76 years)

0.002 0.000]

1.002 [1.001–.003]

 < 0.001

 Sick leave ≥ 28 days in the year before the COVID-19

0.04 [0.03]

1.04 [0.99–1.09]

0.161