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Table 2 Crude and adjusted hazard ratio (HRs) for potential factors related to relapse of P. vivax malaria

From: Plasmodium vivax malaria relapses at a travel medicine centre in Rio de Janeiro, a non-endemic area in Brazil

 

Crude (n = 53)

Adjusted* (n = 48)

  

Model 1

Model 2

HR [CI 95%]

p (Wald)

HR [CI 95%]

p (Wald)

HR [CI 95%]

p (Wald)

Gender

      

Men

2.36 [0.69–8.07]

0.17

2.23 [0.63-7.84]

0.21

3.9 [0.59-26.81]

0.16

Women

1

 

1

 

1

 

Age (years) **

0.97 [0.93-1.02]

0.25

0.95 [0.90-1.01]

0.09

0.94 [0.89-0.99]

0.03

Adverse drug events (ADE)

      

Yes

0.39 [0.09-1.74]

0.22

-

-

-

-

No

1

 

-

-

-

-

Duration of primaquine therapy

      

Short regimen

1

0.18

1

0.14

1

0.04

Long regimen

0.46 [0.15-1.42]

 

0.42 [0.13-1.33]

 

0.28 [0.08-0.98]

 

Primaquine total dose adjusted by weight

      

Yes (≥ 3.2 mg/kg)

1

0.03

1

0.04

-

-

No (< 3.2 mg/kg)

2.94 [1.09-8.33]

 

3.13 [1.08-9.09]

 

-

-

Primaquine total dose (mg/kg)

      

< 3.6

5.24 [0.68-40.15]

0.24

-

-

9.36 [1.06-82.23]

0.04

3.6 – 4.1

1

 

-

-

1

 

> 4.1

7.09 [0.64-78.74]

 

-

-

15.4 [0.79-300.57]

0.07

Concordance

-

-

0.73

 

0.75

 

R square

-

-

0.23

 

0.28

 

p (Wald)

-

-

0.06

 

0.08

 
  1. * Cox regression models. **Continuous variable.