Table 5. Reasons for missed treatment days.

Reason for missed days (n = 59)	Number of missed days	Percentage of totalmissed days	Number of patients	Percentage number of patients
Radiation system was inoperative	212	36.3%	40	67.8%
TPS was inoperative	11	1.9%	9	15.3%
Black out	20	3.4%	14	23.7%
Patient’s poor physical conditions	125	21.4%	23	39.0%
Calendar holiday	83	14.2%	39	66.1%
Adjustment of radiation field	40	6.8%	26	44.1%
Patient related	55	9.4%	13	22.0%
Other	10	1.7%	4	6.8%
Unknown	28	4.8%	3	5.1%

TPS =  treatment planning system.