Table 3.

Combined effects of Anthocyanidins intake and blood Cd levels on COPD incidence

Characteristic Blood cadmium (ug/L)	Anthocyanidins(mg)  Q1(0-1.015)	Anthocyanidins(mg)  Q2(1.015–11.53)	Anthocyanidins(mg)  Q3(>11.56)
Q1(0.07–0.24)	Reference	Reference	Reference
Q2(0.24–0.44)	1.57(0.78,3.19)	0.42(0.23,0.79) **	1.62(0.86,3.05)
Q3(>0.44)	4.88(2.45,9.71)***	0.82(0.50,1.36)	2.29(1.31,4.02) **

In this table, the impact of increasing blood cadmium (Cd) levels on the risk of COPD is displayed with reference to blood cadmium levels in the range of 0.07-0.24ug/L, while varying the intake of anthocyanins. For example, when blood cadmium levels exceed 0.44ug/L and anthocyanin intake is greater than 11.56 mg, the risk of developing COPD is approximately 2.29 times higher compared to when blood cadmium levels are in the range of 0.07-0.24ug/L, with an equivalent anthocyanin intake (> 11.56 mg). (**P < 0.01; ***P < 0.001)