Table 4.

Summary of model-based prediction: significant predictors in at least four out of seven rounds of modeling

Effect	Modeling round, p-value							Number of rounds in which item was found to be a significant predictor
	1	2	3	4	5	6	7
Age	<0.001	<0.001	<0.001	<0.001	<0.001	<0.001	<0.001	7
Sex	<0.001	0.577	0.045	0.116	<0.001	0.004	0.057	6
Smoking status	<0.001	<0.001	<0.001	<0.001	<0.001	<0.001	<0.001	7
Exacerbation history	0.006	0.002	<0.001	<0.001	0.004	<0.001	0.011	7
Item 8	0.027	0.002	0.002	0.021	0.014	<0.001	<0.001	7
Item 2	0.052	0.005	0.002	0.008	<0.001		0.025	6
Item 1	0.047	0.038		0.084	0.079	0.016		5
Item 10	0.012	0.046	0.012	0.090	0.021			5
Item 12			0.007	<0.001	0.002	0.023	<0.001	5
Item 18	0.004	0.028	0.003	0.002		0.013		5
Item 29		0.006	0.017	0.015		0.007	0.023	5
Item 4			0.005	0.008	0.029		0.117	4
Item 35		0.043	0.004	0.004			0.042	4
BMI	0.013	0.030	0.012			0.017		4

Note: Please refer to Table 2 for references to item numbers.

Abbreviation: BMI, body mass index.