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Table 3 Characteristics of exacerbations in ex-/non-smokers (n = 39)

From: Ambulatory pulse oximetry monitoring in Japanese COPD outpatients not receiving oxygen therapy

Follow-up duration (months) Mean ± SD 26.4 ± 6.7
Median (range) 27.8 (4.1–32.8)
All exacerbations Total exacerbations/patients 21/13
     Exacerbation-related admission Total admissions/patients 13/9
     Antibiotic use Total uses/patients 15/10
     Systemic steroid use Total uses/patients 4/4
  1. SD, Standard deviation.