. Author manuscript; available in PMC: 2014 Jan 1.

Published in final edited form as: Cancer Epidemiol Biomarkers Prev. 2012 Oct 23;22(1):50–57. doi: 10.1158/1055-9965.EPI-12-0915-T

Table 3.

Lung cancer risk associated with dietary intakes of calcium and related minerals¹

Nutrient	Quartiles	Median	Range	Cases	HR	95% CI		P-trend
Calcium (mg/day)	1	254	<321	136	Reference
	2	382	321-441	112	0.90	0.70,	1.17
	3	504	441-578	95	0.77	0.58,	1.02
	4	687	>578	85	0.66	0.48,	0.91	0.007

Magnesium (mg/day)	1	193	<222	130	Reference
	2	244	222-266	93	0.79	0.59,	1.05
	3	290	266-319	110	0.95	0.69,	1.30
	4	365	>319	95	0.81	0.54,	1.23	0.50

Phosphorus (mg/day)	1	669	<773	140	Reference
	2	855	773-935	93	0.68	0.51,	0.91
	3	1021	935-1124	111	0.81	0.59,	1.11
	4	1286	>1124	84	0.55	0.36,	0.85	0.02

Ca:Mg ratio	1	1.18	<1.33	142	Reference
	2	1.47	1.33-1.61	95	0.75	0.58,	0.97
	3	1.78	1.61-1.96	109	0.87	0.68,	1.12
	4	2.17	>1.96	82	0.62	0.47,	0.82	0.003

Adjusted for age, total caloric intake, income, occupation, passive smoking, history of asthma and BMI. The median value of each quartile was used to test for linear trend.