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Table 2 primary and secondary outcomes

From: Digital versus analogue chest drainage system in patients with primary spontaneous pneumothorax: a randomized controlled trial

VariableAnalogue
N = 50
Digital
N = 52
P-value
Total duration chest tube drainage (days)3 (2–5)2 (1–12)0.488
LOS (days)3 (2–6)2.5 (1–14)0.640
Number of patients undergoing surgery (n, %)6 (12%)13 (25%)0.127
Number of chest X-ray during admission2.5 (1–4)2 (1–3)0.158
Treatment failure (recurrence within one week) (n, %)3 (6%)3 (6%)>  0.999
Recurrence within 12 weeks follow-up (n, %) (excluding those with treatment failure)7 (16%)
(missing follow-up in n = 3)
4 (8%)0.339
  1. Data presented as median (IQR) or number of patients (%). LOS: length of stay. Statistical tests used: Mann Whitney test, Fisher’s exact test