Table 2.

Lost results because of non-reached pressure level of 150 Pa

	Total	Phase 1	Phase 2	Phase 3	Phase 4
Before decongestion	20,069	19,275	19,103	18,571	18,482
No result		894	966	1498	1587
No result (%)		4.45	5.04	7.84	8.55
After decongestion		15,962	15,918	15,511	15,471
No result		532	576	983	1023
No result (%)		3.23	3.61	6.18	6.60