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Table 1 Objection function values, parameter estimates and their precision for the final covariate model and the bootstrap. The bootstrap estimates are derived from the final covariate model

From: Population pharmacokinetics of a three-day chloroquine treatment in patients with Plasmodium vivax infection on the Thai-Myanmar border

Parameter

Estimated from

Final covariate model (RSE)

Bootstrap 95 % CI

Pharmacokinetic parametera

 MTT (h)

0.773 (43.1)

0.809–2.38

 CLCQ/F (L/h)

6.13 (3.40)

5.74–6.55

 VC CQ/F (L)

468 (16.0)

137–529

 VP CQ/F (L)

1600 (5.21)

1470–1800

 QCQ/F (L/h)

37.7 (18.9)

31.1–69.0

 t1/2 CQ (days)

10.7

 

 CLDCQ/F (L/h)

2.04 (3.50)

1.90–2.18

 VC DCQ/F (L)

2.27 (14.1)

1.62–2.90

 VP DCQ/F (L)

566,257 (14.4)

198–341

 QDCQ/F (L/h)

31.46 (12.3)

1.11–1.83

 t1/2 DCQ (days)

8.74

 

Interindividual variabilityb

 BSV VC DCQ

48.7 (47.5)

17.9–71.1

 BSV VP CQ

20.0 (61.6)

8.25–31.9

 BSV VP DCQ

86.8 (30.5)

49.1–116

 BSV F

19.4 (31.7)

13.1–25.4

Residual variabilityc

 Proportional error CQ

0.401 (5.34)

0.360–0.444

 Proporional error DCQ

0.431 (4.97)

0.393–0.479

  1. MTT mean transit time of the absorption, CLCQ/F apparent clearance of CQ for transformation into desethylchloroquine, VC CQ/F apparent volume of distribution for CQ central compartment, VP CQ/F apparent volume of distribution for CQ peripheral compartment, QCQ/F apparent intercompartmental clearance for CQ, t 1/2 CQ half-life of chloroquine, KFCT constant describing the fraction of change in peripheral volume of distribution of chloroquine with each unit of fever clearance time, CL DCQ/F apparent clearance of DCQ, VC DCQ/F apparent volume of distribution for DCQ central compartment, VP DCQ/F apparent volume of distribution of DCQ peripheral compartment, QDCQ/F apparent intercompartmental clearance for DCQ, t 1/2 half-life of desethylchloroquine. BSV is the between subject variability
  2. aListed as estimates and their relative standard errors (RSE; %) in parenthesis. RSE is calculated based 603 succesfull bootstrap runa (out of 1000) according to: 100 × Standard deviation/Average, 95 % CI is the 95 % confidence interval of the bootstrap parameter estimates
  3. bListed as coefficient of variation (CV; %) and their RSE (%) in parenthesis
  4. cListed as CV (%) and their RSE (%) in parenthesis