Skip to main content

Table 4 Pattern of insomnia and short sleep duration (at T1 and T2) as risk factors for insomnia and short sleep duration at year 2 postpartum (T3)

From: Trajectories of maternal sleep problems before and after childbirth: a longitudinal population-based study

  

Insomnia at year 2 postpartum (T3).

Short sleep duration (<7 h) at year 2 postpartum (T3)

  

Unadjusted model

Adjusted model#

Unadjusted model

Adjusted model#

 

% (N)

RR

95 % CI

RR

95 % CI

RR

95 % CI

RR

95 % CI

Insomnia pattern

         

No insomnia

20.8 % (407)

1.00

-

1.00

-

1.00

-

1.00

-

Insomnia T1 only

19.0 % (372)

2.21

1.60–3.06

2.06

1.40–3.03

1.12

0.86–1.45

0.90

0.65–1.23

Insomnia T2 only

19.4 % (380)

1.92

1.38–2.67

2.00

1.36–2.95

1.12

0.87–1.45

1.01

0.75–1.35

Chronic insomnia

40.7 % (796)

3.58

2.70–4.76

3.31

2.34–4.68

1.45

1.17–1.79

1.20

0.92–1.55

Pattern of short sleep duration*

       

Normal/long sleep

43.3 % (700)

1.00

-

1.00

-

1.00

-

1.00

-

Short sleep T1 only

31.3 % (506)

1.39

1.15–1.68

1.37

1.10–1.71

1.35

1.08–1.70

1.29

1.00–1.68

Short sleep T2 only

8.4 % (136)

1.42

1.10–1.83

1.48

1.10–1.99

1.66

1.24–2.20

1.76

1.30–2.40

Chronic short sleep

16.9 % (273)

1.56

1.26–1.92

1.40

1.08–1.82

2.21

1.78–2.74

2.05

1.58–2.67

  1. *Short sleep duration defined as < 7 h
  2. #Adjusted for maternal age, education, marital status, parity, BMI (week 17 and 32), chronic hypertension, diabetes, and depressive symptoms (all three time periods)