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. 2020 May 11;20:136. doi: 10.1186/s12890-020-1173-3

Table 2.

primary and secondary outcomes

Variable Analogue
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 admission 2.5 (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

Data presented as median (IQR) or number of patients (%). LOS: length of stay. Statistical tests used: Mann Whitney test, Fisher’s exact test