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Table 3 Factors associated with bacteriological positivity among pulmonary TB patients in Tianjin China, 2017–2018

From: Comparison of different bacteriological testing strategies and factors for bacteriological confirmation among pulmonary TB patients: a retrospective study in Tianjin, China, 2017–2018

Characteristic (n)

OR (95% CI)

aOR (95% CI)

P by

wald χ2

Gender (2484)

 Male

ref

ref

0.85

 Female

0.8 (0.7–1.0)

1.0 (0.8–1.2)

Age (2484)

  < 25 yr a

ref

ref

0.19

 25–44

1.2 (1.0–1.6)

1.1 (0.7–1.5)

 45–64

2.0 (1.6–2.6)

1.2 (0.8–1.9)

  ≥ 65 yr

2.9 (2.1–3.9)

1.6 (1.0–2.7)

Ethnic group (2484)

 Han

ref

ref

0.66

 Minority

1.2 (0.6–2.3)

1.2 (0.5–2.9)

Migrant (2484)

 No

ref

ref

0.37

 Yes

0.5 (0.4–0.6)

1.2 (0.8–1.6)

Occupation (2484)

 Student

ref

ref

0.02

 Unemployed

3.2 (2.3–4.4)

1.5 (1.0–2.2)

 Farmer

2.1 (1.5–3.1)

1.7 (1.1–2.8)

 Service/manufacture b

1.1 (0.8–1.6)

1.2 (0.7–1.9)

 State employee

1.3 (1.0–1.8)

0.9 (0.6–1.4)

 Retiree

2.3 (1.7–3.3)

1.3 (0.8–1.9)

 Not provided/unclear

2.4 (1.6–3.7)

0.9 (0.5–1.5)

Hospital pattern of diagnosis (2484)

 City-level TB clinic

ref

ref

< 0.01

 City-level TB hospital c

4.3 (3.5–5.4)

3.4 (2.6–4.4)

 District-level TB clinics

1.6 (1.2–2.1)

0.8 (0.6–1.2)

Time for having TB symptoms d (2,484)

  < 2 weeks

ref

ref

0.00

  ≥ 2 weeks

2.1 (1.7–2.5)

1.4 (1.1–1.8)

Previously treated (2484)

 No

ref

ref

0.05

 Yes

1.8 (1.3–2.4)

1.4 (1.0–2.0)

Symptoms with cough (2463)

 No

ref

ref

< 0.01

 Yes

3.0 (2.5–3.6)

2.2 (1.8–2.8)

Symptoms with blood sputum (2463)

 No

ref

ref

0.04

 Yes

1.9 (1.4–2.8)

1.5 (1.0–2.2)

Cavitation on chest X-ray (2445)

 No

ref

ref

< 0.01

 Yes

4.4 (3.4–5.6)

3.3 (2.5–4.3)

Bilateral lung lobes affected (2445)

 No

ref

ref

< 0.01

 Yes

2.5 (2.1–3.0)

1.7 (1.4–2.2)

Diabetes comorbidity (2303)

 No

ref

ref

0.06

 Yes

2.0 (1.5–2.8)

1.4 (1.0–2.0)

Extra-pulmonary TB concomitance (2303)

 No

ref

ref

0.20

 Yes

1.3 (0.9–1.8)

1.3 (0.9–1.8)

  1. a Totally 30 were age < 15, among whom 20 were bacteriologically negative and 10 were bacteriologically positive. b Occupations in food industry, public transportation, public service attendants, and factory workers. c Designated TB hospital with inpatients. d Defined as the period from symptoms onset to the first arrival in TB facilities