Table 2. Presents number and type complications within each compartment.

Compartment	Procedure	Complication			Types of complications
		No	Yes		Pneumo-thorax	Pneumo-mediastinum	Chest wall emphysema	Lung parenchymal bleeding	Mediastinal haemorrhage	Haemo-thorax
	(N)	(n)	(n)	(n)
Inferior anterior	32	7	33		10	14	1	2	6	0
Singular complication				17	9	6		1	1
Several complications
Event a				5		5			5
Event b				1	1	1
Event c				1		1	1
Event d				1		1		1
Inferior posterior	4	2	4		1	0	0	2	0	1
Singular complication				1				1
Several complications				1	1			1		1
Superior	12	4	11		1	4	1	2	3	0
Singular complication				5		3			2
Several complications
Event a				1	1			1
Event b				1		1			1
Event c				1			1	1
∑:	48	13	48		12	18	2	6	9	1