Table 1

Hypothetical Examples of the Dummy Coding Scheme Used in the Current Study

Hypothetical subject 1 / Age 11 / Age 12 / Age 13 / Age 14 / Age 15 / Age 16
Days of marijuana use (past year) / 0 / 0 / 3 / 0 / 20 / 0
Dummy Codes
Concurrent Use
< monthly use / 0 / 0 / 1 / 0 / 0 / 0
monthly use / 0 / 0 / 0 / 0 / 1 / 0
Impact Following Abstinence
< monthly use / 0 / 0 / 0 / 1 / 0 / 0
monthly use / 0 / 0 / 0 / 0 / 0 / 1
Hypothetical subject 2 / Age 11 / Age 12 / Age 13 / Age 14 / Age 15 / Age 16
Days of marijuana use (past year) / 0 / 53 / 3 / 0 / 23 / 0
Dummy Codes
Concurrent Use
< monthly use / 0 / 0 / 1 / 0 / 0 / 0
monthly use / 0 / 1 / 0 / 0 / 1 / 0
Impact Following Abstinence
< monthly use / 0 / 0 / 0 / 0 / 0 / 0
monthly use / 0 / 0 / 0 / 1 / 0 / 1
Hypothetical subject 3 / Age 11 / Age 12 / Age 13 / Age 14 / Age 15 / Age 16
Days of marijuana use (past year) / 0 / 0 / 3 / 0 / 1 / 0
Dummy Codes
Concurrent Use
< monthly use / 0 / 0 / 1 / 0 / 1 / 0
monthly use / 0 / 0 / 0 / 0 / 0 / 0
Impact Following Abstinence
< monthly use / 0 / 0 / 0 / 1 / 0 / 1
monthly use / 0 / 0 / 0 / 0 / 0 / 0