RT Journal Article
SR Electronic
T1 Independent risk factors for cumulative recurrence rate after first spontaneous pneumothorax
JF European Respiratory Journal
JO Eur Respir J
FD European Respiratory Society
SP 324
OP 331
DO 10.1183/09031936.93.04030324
VO 4
IS 3
A1 Lippert, HL
A1 Lund, O
A1 Blegvad, S
A1 Larsen, HV
YR 1991
UL http://erj.ersjournals.com/content/4/3/324.abstract
AB From 1975 until 1987, 122 patients without (Group I, mean age 34 yrs) and 20 with pre-existing lung disease (Group II, mean age 66 yrs) were treated for their first spontaneous pneumothorax. Mean follow-up was 5.2 yrs (max. 12.8 yrs). There were 32 chest X-ray verified recurrences, 72% occurring during the first 2 yrs. One, 5 and 10 yr cumulative recurrence freedoms +/- standard error in groups I and II combined were 85 +/- 3%, 75 +/- 4% and 69 +/- 5%, respectively. Using Cox regression analysis in groups I and II combined, pulmonary fibrosis, age greater than or equal to 60 yrs, and height/weight ratio were independent predictors of recurrence. Combinations of these risk factors identified four risk strata with 10 yr recurrence freedoms ranging from 83-0%. Independent predictors in group I alone were pulmonary fibrosis, age greater than or equal to 60 yrs, height/weight ratio, and nonsmoking, resulting in four risk strata with 10 yr recurrence freedoms ranging from 98-31%. Recurrences after first-time treated spontaneous pneumothorax showed a distinct time-related pattern and should accordingly be analysed as a time-related event. In both the total patient-population and in the group without pre-existing lung disease, independent predictors of recurrence were identified, which allowed the patients to be substratified into groups with widely different recurrence rates.