Table 2 Results of penalized Cox models in determining the factors affecting time to relapse in patients with pulmonary tuberculosis

Gender

Injection drug addiction

 Female

Reference

–

–

 No

Reference

–

–

 Male

0

0

0

 Yes

0

0

0

Age at diagnosis (years)

History of contact with a patient with TB

 0–35

Reference

–

–

 No

Reference

–

–

 More than 35 years

0.33

1.02

0.99

 Yes

0

0

0

Marital status

HIV infection

 Single

Reference

–

–

 No

Reference

–

–

 Married

0.24

2.14

2.14

 Yes

0

0

0

Education level

Diabetes

 Illiterate

Reference

–

–

 No

Reference

 High School

0

0

0

 Yes

0

0

0

 University education

0

0

0

Residence

Chronic renal failure

 Urban

Reference

–

–

 No

Reference

–

–

 Rural

0

0

0

 Yes

0

1.68

0

BMI

Smear test results before treatment

 < 18.5

Reference

–

–

 1-9Basil

Reference

–

–

 18.5–24.99

0

0

0

 + 1

0

− 0.43

− 0.44

 25–29.99

0

0

0.478

 + 2

0

− 0.04

− 0.074

 > 30

0

0

0

 + 3

0

0

0

Currently incarcerated

Smear test results after 2 months

 No

Reference

–

–

 Negative

Reference

–

–

 Yes

0

0

0

 1-9Basil

0

0

0

 + 1

0

0

0

Prison history

 + 2

0

0

0

 No

Reference

–

–

 + 3

0

0

0

 Yes

0

0

0

Duration of treatment (days)

0

0

0

Chest X-ray

Duration of delay in diagnosis (days)

0

0

0

 Non-suggestive

Reference

–

–

Duration of delay in treatment (days)

0

0

0

 Less suggestive

0

0

0

 More suggestive

0

0

0

LASSO

MCP

SCAD

AIC

578.682

570.416

571.778

LASSO vs. MCP

LASSO vs. SCAD

MCP vs. SCAD

BIC

581.530

578.129

579.132

LRT

3.71

2.4

1.31

p-value

0.29

0.50

0.99