Table 2.

The distribution of patients’ air volume changes in different categories of patterns according to the first five fractions and the entire treatment course. Furthermore, the number of true predictions and the positive predictive value is included. The volume of air according to patterns are furthermore displayed for patients who received primary and postoperative radiotherapy along with the number of true predictions in each category (prediction) and the fraction of true predictions. F1–5: Fraction 1–5.

	Entire cohort				Primary radiotherapy				Postoperative radiotherapy
	All fractions n	F1–5 n	Prediction n	Correct prediction	All fractions n	F1–5 n	Prediction n	Correct prediction	All fractions n	F1–5 n	Prediction n	Correct prediction
Stable	8	22	8	36%	4	6	4	67%	4	16	4	25%
Increasing	25	9	7	78%	7	2	1	50%	18	7	6	86%
Decreasing	7	5	0	0%	0	1	0	0%	7	4	0	0%
Erratic	6	3	0	0%	2	0	0	0%	4	3	0	0%
No air	7	14	7	50%	4	8	4	50%	3	6	3	50%
Total	53	53	22		17	17	9		33	36	13