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Table 2 Summary of each model aspect evaluated during the development and sensitivity phases, with performance measures

From: The in-vivo dynamics of Plasmodium falciparum HRP2: implications for the use of rapid diagnostic tests in malaria elimination

Phase

Model number

Description

TRSS

Number (%) of observations in predicted interval

Development

Base

Previously published model, with updated \(f^{*}\) value of 33.6

176.2

27 (13%)

1

40 h parasite life cycle

185.5

27 (13%)

2

Body fluid estimated by weight. BV = 0.07 × weight, ECF = 0.2 × weight

171.5

30 (14%)

3

Body fluid estimated by weight and sex. BV = 0.07 × weight, ECF = 0.245 × weight for males and ECF = 0.22 × weight for females

164.2

37 (18%)

4

Elimination half-life estimate of 1.67 days

131.1

43 (21%)

5

Elimination half-life lower bound of 95% CI of 1.11 days

102.7

51 (25%)

6

Elimination half-life upper bound of 95% CI of 3.40 days

172.7

28 (13%)

7 (Final)

Body fluid estimated by weight and sex. BV = 0.07 × weight, ECF = 0.245 × weight for males and ECF = 0.22 × weight for females and elimination half-life of 1.67

122.6

57 (27%)

Sensitivity

8

Final model with the upper confidence bound of the 95% CI for \(f^{*}\), \(f = 42.18\)

141.1

49 (24%)

9

Final model with the lower confidence bound of the 95% CI for \(f^{*}\), \(f = 24.97\)

104.8

64 (31%)

10

Final model with the upper confidence bound of the 95% CI for half-life, 3.40 days

160.9

37 (18%)

11

Final model with the lower bound of the 95% CI for half-life, 1.11 days

97.2

57 (27%)

  1. Performance measures evaluated during the development and sensitivity phases were the total residual sum of squares (TRSS) and the number (%) of PfHRP2 observations within the range of the predicted minimum and maximum PfHRP2 concentrations as generated from the models. Model 7 is considered the final model (bold)