Table 2.

Conjoint Effect of Sphingomyelin and C1R on the Odds of AMD

Sphingomyelin	C1R	n	OR	P
Continuous	Continuous	310	1.59 [1.18, 2.14]	0.002
High	Low	88	1
High	High	67	1.75 [0.90, 3.39]	0.097
Low	High	88	1.26 [0.67, 2.37]	0.482
Low	Low	67	2.13 [1.09, 4.17]	0.028

AMD = age-related macular degeneration; C1R = complement protein 1R; high = higher than the median value; low = lower than the median value; OR = odds ratio.

Median value for sphingomyelin = 0.14; median value for C1R = 0.11.