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. 2015 Jun 4;309(3):G162–G170. doi: 10.1152/ajpgi.00280.2014

Table 1.

Results of characteristic parameters estimation by fitting

Case/Model T1/2, min* Tlag, min 103 R AICc w(AICc)† ER‡
1 (Fig. 1)
    PE 79.6 ± 1.9 51.5 ± 0.8 8.3 ± 0.2 −9,154 0.00006 1,750
    GV 77.3 ± 1.8 52.4 ± 0.8 8.5 ± 0.3 −9,144 <10−5 >105
    GVS 97.4 ± 6.9 47.3 ± 1.0 6.6 ± 0.5 −9,169 0.9994
2 (Fig. 3)
    PE 96.5 ± 2.5 64.9 ± 0.7 7.0 ± 0.3 −8,962 <10−9 >109
    GV 90.3 ± 1.6 67.4 ± 0.7 8.0 ± 0.3 −8,995 <10−9 >109
    GVS 84.8 ± 0.9 75.6 ± 1.2 8.8 ± 0.2 −9,080 1.00000
3 (Fig. 4)
    PE 131 ± 6 76.5 ± 1.1 4.7 ± 0.3 −8,389 <10−9 >109
    GV 121 ± 5 78.7 ± 1.1 5.3 ± 0.3 −8,405 <10−9 >109
    GVS 104 ± 1 101 ± 2 7.0 ± 0.2 −8,510 1.00000
4 (Fig. 5)
    GVS 153 ± 43 43.8 ± 1.4 4.2 ± 0.9 −9,425 <10−9 >109
    GVS2 109 ± 14 53.8 ± 1.0 7.2 ± 1.1 −9,675 1.00000
5 (Fig. 6)
    GVS 105 ± 9 23.4 ± 0.5 6.3 ± 0.4 −9,162 <10−9 >109
    GVS2 54.2 ± 0.1 24.2 ± 0.5 13.6 ± 0.2 −9,509 1.00000
6 (Fig. 7)
    GVS 127 ± 4 109 ± 4 4.4 ± 0.3 −8,670 <10−9 >109
    GVS2 109 ± 2 65.8 ± 1.4 6.5 ± 0.3 −9,021 1.00000
7 (Fig. 8)
    PE 64.7 ± 1.0 40.8 ± 0.4 10.0 ± 0.2 −9,567 <10−8 >108
    GVS2 74 ± 10 52.8 ± 0.8 8.4 ± 0.8 −9,605 1.00000

Values are means ± SD. T1/2, time to half emptying; Tlag, time to peak emptying; R, maximal rate; AICc, corrected Akaike Information Criterion; PE, power exponential model; GV, gamma variate model; GVS, gamma variate model with stretched exponential; GVS2, 2-component gamma variate model with stretched exponentials.

*

The values for parameters are best-fit values ± estimated SD by bootstrap method (see text).

†

w(AICc), Akaike weights; see Eq. 8.

‡

ER, evidence ratios (based on Akaike weights) for a given model in favor of the most preferred model, which in cases 1–3 is GVS and in cases 4–7 is GVS2.