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Table 3 Raw parameter estimates: clearance of infections

From: Asymptomatic Plasmodium falciparum infections may not be shortened by acquired immunity

Survival model

Scale

Shape

AIC

\(r_1\)

\(r_2\)

\(r_3\)

\(r_4\)

\(r_5\)

\(r_6\)

\(s_1\)

\(s_2\)

\(s_3\)

\(s_4\)

\(s_5\)

\(s_6\)

Weibull

1.00

1.31

1.01

0.75

0.94

1.23

0.49

0.47

0.67

0.58

0.66

0.75

7,908.5

Gamma

9.02

12.37

6.24

6.64

7.06

8.44

0.10

0.10

0.12

0.09

0.10

0.12

7,944.8

Lognormal

1.68

1.86

1.54

1.51

1.62

1.71

1.32

1.37

1.06

1.06

1.18

1.24

7,978.3

Exponential

3.73

5.30

2.93

2.15

2.10

2.18

8,022.6

  1. Parameter estimates are shown for all models and host age groups. The exponential distribution is defined by a single “scale” parameter per age group, while all other distributions require an additional “shape” parameter. Derived measures, such as the mean duration, are obtained in conjunction with the equations in Table 1. The survey interval of two months was used as time unit where applicable. Lower AIC values indicate a better fit to the data.