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Table 2 Risk of overall recurrence based on patient characteristics and types of intervention

From: Male adolescents with contralateral blebs undergoing surgery for primary spontaneous pneumothorax may benefit from simultaneous contralateral blebectomies

  Overall recurrence, % (n) Univariate analysis Multivariable analysis
HR (95% CI) p value HR (95% CI) p value
Age (y)
 Age < 16.5 34 (11/32) 2.86 [1.11–7.38] 0.030 2.81 [1.08–7.30] 0.034
16.5 age < 18 27 (14/52) 1.94 [0.78–4.82] 0.151 1.49 [0.60–3.74] 0.393
18 age < 19 15 (7/48) Reference   Reference  
BMI (kg/m2)
  ≥ 18.5 30 (20/67) Reference   Reference  
  < 18.5 18 (12/65) 0.9 [0.45–1.81] 0.777 0.98 [0.49–1.97] 0.950
Smoking
 No 26 (31/117) Reference   Reference  
 Yes 7 (1/15) 0.22 [0.03–1.63] 0.139 0.35 [0.05–2.60] 0.303
Intervention
 B+cb 9 (3/32) Reference   Reference  
 U+cb 45 (18/40) 6.44 [1.89–21.93] 0.003 6.06 [1.77–20.75] 0.004
 U−cb 18 (11/60) 2.11 [0.59–7.55] 0.253 1.81 [0.50–6.58] 0.365
  1. BMI body mass index, B+cb those with contralateral blebs receiving one-stage bilateral surgeries, U+cb those with contralateral blebs only receiving unilateral surgery, Ucb those without contralateral blebs only receiving unilateral surgery. Data are presented as % (n)