Table 2 Poisson regression analyses of the sickness absence of employed mother and fathers, with the number of sickness days as the dependent variable. The sample consisted of primiparae women and fathers, birth cohort (2001–2005)

 Cerebral palsy/spina bifida

16.95

7.76

0.029

7.91

4.68

0.091

 Down syndrome

−2.95

5.20

0.570

8.80

7.08

0.214

 Without special needs

reference

reference

 2 years prior to the birth

−29.53

0.42

0.000

−0.95

0.20

0.000

 Birth year

20.09

0.21

0.000

0.56

0.17

0.001

 1 year after the birth

−18.57

0.34

0.000

0.28

0.17

0.110

 2 years after the birth

4.97

0.27

0.000

1.03

0.19

0.000

 3 years after the birth

4.26

0.28

0.000

1.34

0.19

0.000

 4 years after the birth

−0.85

0.31

0.006

1.99

0.20

0.000

 1 year prior to the birth

reference

reference

 Cerebral palsy/spina bifida × 2 years prior to the birth

6.83

11.27

0.544

−2.64

5.40

0.624

 Cerebral palsy/spina bifida × year of the birth

−1.19

5.91

0.840

5.87

3.40

0.084

 Cerebral palsy/spina bifida × 1 year after the birth

35.42

7.12

0.000

4.72

3.66

0.197

 Cerebral palsy/spina bifida × 2 years after the birth

9.45

7.35

0.199

1.81

4.77

0.703

 Cerebral palsy/spina bifida × 3 years after the birth

3.52

7.40

0.634

0.63

4.18

0.880

 Cerebral palsy/spina bifida × 4 years after the birth

6.23

7.60

0.412

4.88

3.70

0.187

 Down syndrome × 2 years prior to the birth

−4.83

11.55

0.676

4.47

5.37

0.406

 Down syndrome × year of the birth

12.65

6.43

0.049

3.94

4.37

0.367

 Down syndrome × 1 year after the birth

26.16

7.79

0.001

−5.56

5.01

0.267

 Down syndrome × 2 years after the birth

11.70

8.09

0.148

−11.74

8.24

0.154

 Down syndrome × 3 years after the birth

9.36

7.83

0.232

−5.61

6.43

0.383

 Down syndrome × 4 years after the birth

16.11

8.56

0.060

−7.02

8.48

0.408

 Pseudu R2

0.083

0.064