assumes the following temporal ordering of variables: A1, L1, M1. V0 is included in the weight model.
V0 includes: baseline covariates (HIV status, race, education, income); past year cannabis, cocaine, other stimulants, and illicit opioids measured at time 0; past year alcohol measured at time 0; and current depression, anxiety, smoking, and pain measured at time 0
L1 past year cannabis, cocaine, other stimulants, and opioids measured at time 1
U1 Potential unmeasured common causes at time 1
A1 past year alcohol measured at time 1
M1 current depression, anxiety, smoking, and pain measured at time 1 (exclude outcome)
Y1 outcome measured at time 1 (for depression, anxiety, smoking, and pain as outcome only)