Table 3 Subgroup analysis.

From: Association between vitamin B2 intake and female infertility: a cross-sectional study

 

OR(95%CI)

P value

P for interaction

Age group

  

0.653

 < 30

0.83(0.56, 1.24)

0.34

 

 ≥30

0.81(0.67, 0.97)

0.03

 

Race

  

0.089

 Mexican American

0.81(0.49, 1.34)

0.35

 

 Non-Hispanic Black

1.18(0.84, 1.67)

0.3

 

 Non-Hispanic White

0.69(0.55, 0.86)

0.002

 

 Other Hispanic

0.80(0.47, 1.34)

0.37

 

 Others

1.53(0.93, 2.53)

0.09

 

BMI group

  

0.858

 < 25

0.78(0.58, 1.03)

0.08

 

 ≥ 25

0.81(0.68, 0.97)

0.03

 

Smoking status

  

0.782

 Never

0.76(0.61, 0.94)

0.01

 

 Former

0.78(0.43, 1.42)

0.4

 

 Now

0.93(0.66, 1.29)

0.63

 

Drinking status

  

0.178

 Never

0.83(0.51, 1.33)

0.42

 

 Former

0.77(0.55, 1.08)

0.13

 

 Mild

0.71(0.44, 1.13)

0.14

 

 Moderate

0.92(0.65, 1.29)

0.61

 

 Heavy

0.79(0.51, 1.24)

0.29

 

Ever treated for a pelvic infection/PID

  

0.542

 Yes

1.01(0.54, 1.89)

0.96

 

 No

0.79(0.67, 0.94)

0.01

 

Ever taken birth control pills

  

0.744

 Yes

0.83(0.68, 1.00)

0.05

 

 No

0.75(0.46, 1.20)

0.22

 

Ever use female hormones

  

0.381

 Yes

0.77(0.41, 1.44)

0.38

 

 No

0.83(0.69, 1.01)

0.06

 
  1. OR odd ratio, CI confidence interval, PID pelvic inflammatory disease. Model was adjusted for age, race, marital status, education level, PIR and marital status, BMI, physical activity, smoking status, drinking status, HEI-2015, age at menarche, pelvic infection/PID history, use of birth control pills, and use of female hormones, except for covariates used for subgrouping.
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