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Table 2 Between- and within-subject variance and reliability coefficients for serum FSH in subset of healthy women, NYU Women's Health Study

From: Reliability of follicle-stimulating hormone measurements in serum

  Premenopausal N = 16 Postmenopausal N = 44
Variance components   
   Between subjects 0.057 0.102
   Within subjects 0.600 0.044
Reliability coefficient, ρ 0.09 0.70
   95% confidence interval 0–0.54 0.55–0.82
Coefficient of variation, % (within-assay) 4.6 3.2