Table 3 Linear regression model to identify factors potentially associated with age at menopause

First marriage age (Years old)

-0.07

-0.16,0.02

0.112

0.03

-0.09,0.10

0.942

Education (years)

0.17

0.04,0.29

0.009

0.06

0.08,0.21

0.381

Gradiva

0.29

0.16,0.43

< 0.001

0.29

0.04,0.41

0.010

Number of abortions

0.39

-0.02,0.80

0.061

0.08

-0.40,0.57

0.724

Breast feeding Duration

0.007

0.00,0.01

0.024

0.002

0.00,0.01

0.714

BMI (< 25) (Ref: ≥25)

0.22

-0.71,1.15

0.641

-

-

-

Having a history of stillbirth (Ref: No history)

-0.13

-1.17,0.91

0.801

-

-

-

Tubal ligation (Ref: No)

0.03

-0.88,0.94

0.948

-

-

-

Infertility (Ref: No)

-1.89

-3.79,0.01

0.051

-0.25

-2.51,2.00

0.827

Diabetes (Ref: No)

-0.20

-1.77,0.17

0.684

-

-

-

Hypertension (Ref: No)

-0.37

-1.51,0.25

0.407

-

-

-

Cardiovascular disease(Ref: No)

-1.20

-1.32,0.02

0.064

-1.89

-2.98,-0.09

0.035

Thyroid disease (Ref: No)

-0.86

-2.05,0.34

0.161

-0.29

-1.51,0.92

0.640

Depression (Ref: No)

-0.66

-2.76,1.42

0.532

-

-

-

Smoking(Non-smokers) (Ref: Smokers)

-0.23

-1.39,0.93

0.696

-

-

-

Marital status (Not married) (Ref: Married)

-0.38

-1.44,0.67

0.480

-

-

-

Residence type (urban) (Ref: Rural)

-0.77

-1.81,0.27

0.146

-1.38

-2.46,-0.29

0.013

Socioeconomic status(poor) (Ref: Rich)

-0.95

-1.79,-0.10

0.028

-1.47

-2.81,-0.07

0.010

Socioeconomic status (moderate) (Ref: Rich)

-0.15

-1.19,0.88

0.767

-0.31

-1.48,-0.84

0.593