Table 1.

Median and interquartile range of variable rankings and importance measures on simulated interacting risk factors

	GBM				MCLR				RF
	Median ranking	Ranking interquartile range	Median importance	Importance interquartile range	Median ranking	Ranking interquartile range	Median importancea	Importance interquartile rangea	Median ranking	Ranking interquartile range	Median importance	Importance interquartile range
Chromosome 6, SNP A, Dominant	1	No variation	43.18	43.08–43.27	4	3–4	1	No variation	2	2–3	110.5	106.8–113.4
Chromosome 6, SNP A, Recessive	3	No variation	9.23	9.20–9.25	3	2–3	1	No variation	4	No variation	55	53.0–57.1
Chromosome 6, SNP B, Dominant	2	No variation	39.02	38.94–39.14	5	4–5	1	No variation	3	2–3	108	105.1–110.4
Chromosome 6, SNP B, Recessive	--b	--	--	--	256	217–300	0.0009628	0.0008214–0.001118	6	No variation	23.4	22.5–24.4
Chromosome 8, Disease Locus, Dominant	13	12–13	0.07	0.065–0.075	7	6–7	0.9998	0.9921–1	14	No variation	2.6	2.5–2.6
Chromosome 8, Disease Locus, Recessive	--	--	--	--	21	11–44	0.0105	0.003999–0.428	1322	1079–1533	0.57	0.53–0.61
Chromosome 16, Disease Locus, Dominant	--	--	--	--	624	525–716	0.0004029	0.0003219–0.0004992	51	40–75	0.85	0.81–0.91
Chromosome 16, Disease Locus, Recessive	11	No variation	0.087	0.083–0.093	2027	1757–2305	0.0000826	5.63e-5-0.0001214	31	29–32	1.05	1.01–0.12
Sex	5	No variation	1.975	1.96–1.99	2	2–6	0.9998	0.9921–1	8	No variation	11.8	11.6–12.4
Smoking	4	No variation	2.35	2.34–2.36	20	10–43	0.0105	0.003999–0.428	10	No variation	6.8	6.6–7.1

^aProportion of times variable selected out of 10,000,000 moves in the Markov chain.

^bVariable had importance = 0 for median and first and third quartile, so it was not ranked.