Table 4 Comparison of propensity score matching for WAI (N = 7911)

 Intercept

−0.16 (−0.67,0.34)

0.26

–

0.85 (0.51,1.41)

–

−0.63

0.529

 Sex

−0.13 (−0.25, −0.01)

0.06

−0.12

0.88 (0.77,0.99)

1.02

−2.194

0.028

 Age

−0.09 (−0.17, −0.01)

0.04

−0.19

0.91 (0.85,0.99)

2.92

−2.11

0.035

 Ethnicity

−0.06 (−0.11, −0.02)

0.02

−0.14

0.94 (0.9,0.98)

1.03

−2.612

0.009

 Education

0.25 (0.19,0.32)

0.03

0.42

1.28 (1.2,1.38)

1.11

7.377

< 0.001

 Working years

−0.27 (− 0.33, − 0.2)

0.03

− 0.72

0.76 (0.72,0.82)

2.79

−8.045

< 0.001

 Professional title

− 0.17 (− 0.25, − 0.08)

0.04

− 0.24

0.84 (0.78,0.92)

1.59

−3.724

< 0.001

 The level of BSL

0.21 (0.11,0.31)

0.05

0.23

1.23 (1.12,1.36)

1.05

4.177

< 0.001

 Marital status

−0.17 (− 0.28, − 0.05)

0.06

− 0.2

0.84 (0.75,0.95)

1.63

−2.81

0.005

 Number of night shifts per month

−0.18 (− 0.22, − 0.13)

0.02

−0.44

0.84 (0.8,0.88)

1.17

−7.487

< 0.001

 Overall sleep condition

0.58 (0.52,0.64)

0.03

1.17

1.79 (1.68,1.89)

1.08

19.609

< 0.001

 Intercept

−0.03 (− 0.6,0.55)

0.29

–

0.97 (0.55,1.73)

–

−0.092

0.926

 Sex

−0.15 (− 0.29, − 0.01)

0.07

−0.13

0.86 (0.75,0.99)

1.02

−2.14

0.032

 Age

0.02 (−0.07,0.11)

0.04

0.05

1.02 (0.94,1.12)

2.67

0.509

0.611

 Ethnicity

0.06 (0.01,0.11)

0.03

0.14

1.06 (1.01,1.12)

1.03

2.415

0.016

 Education

−0.05 (−0.12,0.03)

0.04

−0.08

0.95 (0.88,1.03)

1.11

−1.213

0.225

 Working years

0 (−0.07,0.08)

0.04

0.01

1 (0.94,1.08)

2.57

0.123

0.902

 Professional title

0.05 (−0.05,0.15)

0.05

0.07

1.05 (0.95,1.16)

1.52

0.993

0.321

 The level of BSL

0.09 (−0.02,0.2)

0.05

0.1

1.09 (0.98,1.22)

1.05

1.634

0.102

 Marital zstatus

−0.07 (−0.2,0.06)

0.07

−0.08

0.93 (0.82,1.06)

1.58

−1.054

0.292

 Number of late shifts per month

0.01 (−0.04,0.07)

0.03

0.03

1.01 (0.96,1.07)

1.18

0.546

0.585

 Overall sleep condition

0.05 (−0.01,0.12)

0.03

0.09

1.05 (0.99,1.12)

1.09

1.53

0.126