Table 2.

ICCs over 2 to 3 y for stress hormones among premenopausal women in the NHSII

AnalyteNo. of participants/number of time pointsCV (%)Median (5th-95th percentile)Within-person CVBetween-person CVICC (95% CI)
Catecholamines, urine (μg/g creatinine)
 Norepinephrine38/32.424 (11–51)35.728.80.38 (0.19–0.62)
 Dopamine38/33.1192 (113–255)18.216.80.45 (0.27–0.64)
Free cortisol, urine (μg/g creatinine)38/34.517.8 (4.1–84.3)80.647.30.25 (0.09–0.51)
Free cortisol, plasma (μg/dl)
 Follicular38/212.80.96 (0.30–2.39)60.912.00.02 (0.00–1.00)
 Luteal38/210.20.99 (0.24–2.50)68.90.00.00
 Average38/211.51.02 (0.54–2.10)43.414.50.09 (0.00–0.91)
Total cortisol, plasma (μg/dl)
 Follicular38/29.114.0 (7.00–24.0)34.220.40.25 (0.06–0.62)
 Luteal38/27.115.0 (7.00–24.0)32.326.00.38 (0.16–0.66)
 Average38/28.114.5 (8.50–23.0)24.921.00.41 (0.18–0.67)