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Table 3 Odds ratios of weekly working hours on threatened abortion

From: Long working hours and pregnancy complications: women physicians survey in Japan

 

Crude

Adjusted

  

OR

95% CI

OR

95% CI

Weekly working hours

    
 

71≤

3.49

(1.89-6.42)

3.17

(1.69-5.95)

 

51-70

1.69

(0.91-3.13)

1.67

(0.89-3.12)

 

41-50

0.85

(0.42-1.72)

0.88

(0.43-1.80)

 

≤40

1.00

1.00

Specialty groupa

    
 

Surgery

0.64

(0.34-1.23)

0.63

(0.32-1.23)

 

General medicine

1.04

(0.56-1.91)

0.88

(0.47-1.66)

 

Others

1.00

1.00

Maternal age, years

    
 

33≤

0.55

(0.31-1.00)

0.77

(0.39-1.53)

 

30-32

0.55

(0.31-1.00)

0.73

(0.37-1.45)

 

28-29

0.73

(0.38-1.38)

1.02

(0.49-2.10)

 

<28

1.00

1.00

Current household income

    
 

Lowest quintile

2.19

(0.69-6.95)

1.50

(0.43-5.22)

 

Second lowest quintile

2.78

(1.22-6.33)

2.19

(0.90-5.31)

 

Middle

1.49

(0.66-3.35)

1.48

(0.64-3.40)

 

Second highest quintile

1.33

(0.67-2.61)

1.34

(0.67-2.68)

 

Highest quintile

1.00

1.00

  1. "Crude" incdicates univariate analyses and "Adjusted" indicates all variables in the model; Subjects with preterm birth were excluded in the model where threatened abortion was dependent variable; Similarly, subjects with threatened abortion were excluded in the model where preterm birth was dependent variable.
  2. aSpecialty group consists of "Surgery" including General Surgery, Otorhinolaryngology, Dermatology, Urology, OBGY, Opthalmology, Orthopedic Surgery, Plastic Surgery, Cosmetic Surgery, and Neurosurgery, "General Medicine" including Internal medicine, Pediatrics, Psychosomatic Medicine, Family Medicine, Neurology, and Palliative Care, and “Others” including Psychiatry, Anesthesiology, Radiology, Basic medicine, Rehabilitation, Emergency Medicine, and those who has not chosen specialty yet.