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. Author manuscript; available in PMC: 2022 Feb 1.
Published in final edited form as: Environ Res. 2020 Nov 24;193:110506. doi: 10.1016/j.envres.2020.110506

Table 2.

Number of significant metabolic features by negative and positive electrospray ion mode associated with lag 1 day (i.e., previous day) and the moving average of lag 1-2 days pollution from Tobit models.

Lag* Negative mode a Positive mode a
CO L1 400 216
MA 465 173
NO2 L1 618 338
MA 526 280
O3 L1 603 245
MA 376 247
PM2.5 L1 603 259
MA 545 244
EC L1 498 208
MA 606 230
OC L1 581 251
MA 473 254
*

L1, the exposure at lag 1 day; MA, the moving average of exposure at lag 1-2 days; EC, elemental carbon, OC, organic carbon.

a

Metabolic features were statistically significant with p-values less than 0.05.