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. 2022 Jul 18;83(4):486–493. doi: 10.15288/jsad.2022.83.486

Table 3.

Pairwise comparisons mean levels of ng/ml of tetrahydrocannabinol in blood among alcohol change groups in a sample of drivers with alcohol ignition interlock devices (N = 189)

graphic file with name jsad.2022.83.486tbl3.jpg

Referent group Comparison group M difference SE p
Alcohol decrease Alcohol maintenance 7.319 3.321 .029
Alcohol increase 9.639 3.481 .006
Alcohol maintenance Alcohol decrease −7.319 3.321 .029
Alcohol increase 2.320 3.024 .444
Alcohol increase Alcohol decrease −9.639 3.481 .006
Alcohol maintenance −2.320 3.024 .444