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Fig 1.

Study design and period.

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Table 1.

Baseline characteristics and outcomes of study participants.

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Fig 2.

Hazard ratio for exacerbation according to COPD medication.

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Fig 2 Expand

Fig 3.

Hazard ratio for exacerbation according to period of medication use.

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Fig 3 Expand

Table 2.

Clinical outcomes according to the active ingredient of chronic obstructive pulmonary disease medication.

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Table 2 Expand