Table 2.

Intraclass correlation coefficients (95% confidence intervals) for repeated measures of pituitary hormones by menopausal status

HormonePremenopausal women (all phases of cycle), n = 30; 3 visits
Premenopausal women (same phase of cycle),*n = 30; 2 visits
Postmenopausal women, n = 35; 2 visits
ICC (95% CI)
FSH0.37 (0.15-0.60)0.62 (0.35-0.80)0.72 (0.52-0.85)
LH0.44 (0.21-0.65)0.64 (0.38-0.81)0.83 (0.68-0.91)
TSH0.85 (0.74-0.92)0.81 (0.65-0.91)0.85 (0.72-0.92)
PRL0.69 (0.52-0.82)0.58 (0.29-0.78)0.72 (0.52-0.85)
GH0.35 (0.13-0.58)0.42 (0.08-0.67)0.60 (0.34-0.78)
ACTH0.94 (0.90-0.97)0.93 (0.86-0.97)0.95 (0.91-0.98)
  • Abbreviation: ICC, intraclass correlation coefficient; 95% CI, 95% confidence interval.

  • * Limited to 30 premenopausal women with 2 visits at the same phase of menstrual cycle.