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. Author manuscript; available in PMC: 2018 Sep 1.
Published in final edited form as: J Clin Psychiatry. 2017 Sep-Oct;78(8):1075–1082. doi: 10.4088/JCP.15m10591

Table 2.

Percent stimulant abstinent days based on Timeline Follow Back (TLFB) and Eliminate Contradiction (ELCON) algorithm adjustment

Outcome N All
Mean (SD)		 n DEI
Mean (SD)		 n HEI
Mean (SD)
TLFB 291 91.2 (15.6) 145 90.8 (16.4) 146 91.6 (14.7)
ELCON algorithm 302 76.4 (26.3) 152 75.5 (27.4) 150 77.2 (25.1)

Note. Mean percent stimulant abstinent days are for days 22 to 84. Eleven participants had no TLFB data: their data are missing when there is no imputation (TLFB row); their data are present when there is imputation and all data are imputed as stimulant use days (ELCON algorithm row).