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. 2011 Mar 1;34(3):325–333. doi: 10.1093/sleep/34.3.325

Table 3.

Parameter estimates and confidence intervals from Gompertz functions fit to age-related declines in power of theta EEG recorded at 5 electrode sites

Estimate
Parameter Fz Cz C4 C3 O1
    D (μV2) 250.0 270.3 164.3 176.3 118.7
    A (μV2) 219.2 225.7 126.4 131.0 82.5
    C 0.3121 0.3820 0.4189 0.4331 0.4452
    M (years) 12.68 12.13 12.49 12.04 11.98
    Lag (years) 9.48 9.51 10.10 9.73 9.73
95% Confidence Interval
Parameter Fz Cz C4 C3 O1
    D (μV2) 222.1 – 277.9 243.9 – 296.7 149.1 – 179.5 157.6 – 195.0 104.7 – 132.8
    A (μV2) 174.0 – 264.4 194.1 – 257.3 108.0 – 144.8 109.5 – 152.5 65.1 – 99.9
    C 0.2333 – 0.3909 0.3226 – 0.4415 0.3413 – 0.4966 0.3519 – 0.5143 0.3195 – 0.5710
    M (years) 12.18 – 13.18 11.77 – 12.49 12.14 – 12.85 11.65 – 12.43 11.41 – 12.55

Power = Inline graphic D, upper asymptote; A, drop to lower asymptote; C, relative decline rate; M, age at which decline rate is maximal; Lag, M-1/C