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Table 4 Predictors of unfavorable outcome (compared to cure) assessed at the end of study (n = 392) †

From: Predictors of pulmonary tuberculosis treatment outcomes in South Korea: a prospective cohort study, 2005-2012

Variable

Univariate

Multivariate‡

  

OR

95% CI

OR

95% CI

Gender

Female

1

 

1

 
 

Male

1.29

0.70-2.35

1.14

0.59-2.20

Age

20-34

1

 

1

 
 

35-49

1.96*

1.07-3.57

2.14*

1.11-4.14

 

≥50

2.75**

1.50-5.05

2.97**

1.51-5.86

Body Mass Index

<18.5

1

 

1

 
 

≥18.5

0.47**

0.31-0.73

0.33***

0.20-0.54

Diabetes

No

1

 

1

 
 

Yes

2.47***

1.51-4.05

2.57**

1.46-4.52

Alcohol, within 6 months

Less than once a week

1

 

-

 
 

Several times a week

0.52

0.26-1.05

  
 

At least once a day

0.92

0.58-1.48

  

Smoking, within 6 months

Never smoked

1

 

-

 
 

< 1 pack/day

1.71

0.99-2.97

  
 

1 pack/day

1.14

0.66-1.97

  
 

> 1 pack/day

1.03

0.57-1.89

  

Residence

Small city and town

1

 

-

 
 

Large city

1.19

0.78-1.83

  

Education

High school, above

1

 

-

 
 

Middle school, below or refusal

1.40

0.92-2.15

  

Occupation

Health care, professional and office work

1

 

-

 
 

Service sector and laborer

1.35

0.66-2.76

  
 

Unemployment and others

1.54

0.73-3.24

  

Chest X-ray

     

Grade

Minimal or moderate

1

 

-

 
 

Far advanced

2.09**

1.35-3.24

  

Cavity

No

1

 

-

 
 

Yes or not clear

1.25

0.72-2.15

  

Nodular lesion

No

1

 

-

 
 

Yes or not clear

1.44

0.60-3.48

  

Bilateral

Unilateral

1

 

-

 
 

Bilateral

2.67**

1.38-5.18

  

Number of previous treatment episodes

0 (new case)

1

 

-

 
 

1

1.7

0.90-3.22

  
 

2

1.04

0.48-2.27

  
 

≥3

4.66***

2.69-8.08

  

History of failure

No

1

 

-

 
 

Yes

3.32***

2.11-5.22

  

History of TI

No

1

 

-

 
 

Yes

2.26***

1.45-3.51

  

Number of significant regimen changes

0

1

 

-

 
 

≥1

1.21

0.75-1.93

  

Drug Susceptibility pattern (n = 401)

DS

1

 

1

 
 

Mono/poly-R

1.42

0.68-2.97

1.45

0.67-3.13

 

Rif, mono-R

1.69

0.42-6.87

2.87

0.64-12.95

 

MDR

3.39***

2.09-5.50

4.51***

2.64-7.68

  1. *p <0.05, **p <0.01, ***p < 0.001.
  2. † Favorable outcome is cured (n = 267) and unfavorable outcome includes failure (n = 22), death (n = 86) and relapse (n = 17) assessed at the end of study.
  3. ‡ Multivariate model includes age, gender and all significant factors from the univariate model.
  4. TI: treatment interruption; DS: Drug susceptible, Mono/poly-R: mono or poly-drug resistance that is not matched with the definition of multidrug-resistant tuberculosis or rifampin mono resistance; MDR: multidrug-resistant tuberculosis.