Table 5.

Comparison of the causes of death between the PPR-OT group and the control group in the prospective observational study

Causes of death	PPR-OT group (n=85)	Control group (n=47)
Respiratory failure	14*	14
Sudden death	4**	1
Cardiovascular events	1	4
Malignant diseases	3	2
Other diseases	2	0
Total	24 (28.2%)*	21 (44.7%)
Observation period (years), mean ± SD	6.1±1.6	5.1±2.5

Notes:

^*P<0.0001 and

^**P=0.0059, based on the chi-squared test.

Abbreviations: PPR-OT, personalized patient-specific pulmonary rehabilitation-occupational therapy; SD, standard deviation.