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Table 3 Correlation of POI with confounding variablesa

From: Association between serum vitamin A levels and premature ovarian insufficiency: a case–control, cross-sectional survey study

Confounders POI Age BMI Annual household income Education FSH
(IU/L)
LH
(IU/L)
E2
(pmol/L)
AMH
(ng/mL)
Vitamin A
(µg/L)
TC (mmol/L) Vitamin A/TC
POI             
Age 0.06            
BMI 0.10 0.08           
Annual household income -0.46** 0.10 -0.13          
Education -0.46** -0.15 -0.11 0.50*         
FSH (IU/L) 0.85** 0.22* -0.04 -0.32** -0.39**        
LH (IU/L) 0.85** 0.11 -0.04 -0.39** -0.39** 0.82**       
E2 (pmol/L) 0.09 0.08 -0.08 -0.12 -0.01 0.04 0.00      
AMH (ng/mL) -0.86** -0.26** -0.12 0.33** 0.40** -0.84** -0.71* -0.14     
Vitamin A (µg/L) 0.21* 0.09 0.22* -0.14 -0.19* 0.62** 0.14 0.02 -0.21*    
TC
(mmol/L)
0.46** 0.20* 0.09 -0.19* -0.26** 0.40** 0.42* 0.10 -0.36** 0.27**   
Vitamin A/TC -0.20* -0.07 0.14 -0.07 0.06 0.19* -0.22* -0.10 0.08 0.62** 0.54**  
  1. FSH follicle-stimulating hormone, LH luteinizing hormone, E2 estradiol, AMH anti-Müllerian hormone
  2. aSpearman rank correlation coefficient
  3. *Significant correlation at p < 0.05 (two-tailed)
  4. **Significant correlation at p < 0.01 (two-tailed)