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Table 2 Hazard Ratio and 95 % Confidence Intervals of Lung Cancer According to ICS and Pulmonary Infection Combinations in Patients with COPD

From: Post-inhaled corticosteroid pulmonary tuberculosis and pneumonia increases lung cancer in patients with COPD

 

All patients with COPD

HR (95 % CI)

P-value

Pulmonary infection combinations

 None

Reference

 

 Only ICS

0.88 (0.67–1.14)

0.314

 Only pneumonia

0.95 (0.62–1.46)

0.818

 Only TB

1.42 (0.89–2.26)

0.145

 TB+pneumonia

1.68 (0.78–3.65)

0.187

 Post-ICS pneumonia

1.17 (0.69–1.98)

0.554

 Post-ICS TB

2.42 (1.28–4.58)

0.007

 Post-ICS TB+pneumonia

2.37 (1.01–5.54)

0.046

Medications

 OCS

0.91 (0.72–1.16)

0.442

 LABA

1.18 (0.93–1.50)

0.177

 SABA

1.32 (1.07–1.64)

0.010

 Theophylline

1.21 (0.99–1.48)

0.052

 Statins

1.05 (0.82–1.35)

0.704

 Aspirin

0.89 (0.76–1.05)

0.173

Sex

 Men

2.76 (2.20–3.48)

<0.001

 Women

Reference

 

Age group

 20–39

-

-

 40–59

Reference

 

 60–79

4.69 (3.28–6.69)

<0.001

80

6.47 (4.42–9.48)

<0.001

Urbanization

 High

Reference

 

 Mid

1.05 (0.89–1.24)

0.575

 Low

0.97 (0.77–1.23)

0.799

Comorbidities

 Chronic kidney disease

1.35 (0.94–1.93)

0.102

 Diabetes

0.99 (0.82–1.21)

0.967

 Hyperlipidemia

1.08 (0.85–1.36)

0.544

 Liver cirrhosis

0.84 (0.43–1.62)

0.599

 Smoking-related cancers

1.57 (0.91–2.73)

0.107

 Autoimmune disease

1.57 (1.07–2.32)

0.022

 Atopy dermatitis

0.67 (0.36–1.25)

0.208

 Rhinosinusitis

0.90 (0.75–1.08)

0.263

No. of outpatient visits for respiratory diseases within 2 years after index datea

 ≤15

Reference

 

 >15

1.27 (1.03–1.56)

0.025

No. of inpatient visits for respiratory diseases within 2 years after index datea

 0

Reference

 

 ≥1

1.07 (0.85–1.35)

0.582

  1. Reference was defined as the reference group
  2. CI confidence interval, COPD chronic obstructive pulmonary disease, HR hazard ratio, ICS inhaled corticosteroid, LABA long-acting inhaled beta-agonist, OCS oral corticosteroid, SABA short-acting beta-agonist, TB pulmonary tuberculosis
  3. aIndex date was defined as the date of initiation of ICS