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. Author manuscript; available in PMC: 2011 Sep 15.
Published in final edited form as: Am J Drug Alcohol Abuse. 2011 Sep;37(5):426–433. doi: 10.3109/00952990.2011.596972

TABLE 4.

Retention based on three criteria across time points.

Study Availability of the primary outcome measure(s) (%) Treatment exposure (%) Attendance at follow-up visits (%)
CTN0001-BUP1 inpatient 40 74 69
CTN0002-BUP2 outpatient 59 73 61
CTN0003-BUP3 taper 72 79 47
CTN0004-MET 53 69 68
CTN0005-MI 64 89 76
CTN0006-MIEDAR drug-free 60 88 69
CTN0007-MIEDAR methadone 77 95 83
CTN0009-smoking 81 82 79
CTN0010-BUP adolescent 62 88 61
CTN0011-TELE 71 56 72
CTN0013-MET pregnant 98 71 77
CTN0014-BSFT 76 59 73
CTN0015-seeking safety 611 54 61
CTN0017-HIV 71 77 64
CTN0018-safe sex for men 78 50 71
CTN0019-safe sex for women 75 45 67
CTN0020-job seekers 86 59 84
CTN0021-Spanish MET 88 75 82
CTN0027-START 67 64 47
CTN0028-ADHD adolescent 862 80 71
CTN0029-ADHD adult 87 91 82
CTN0030-POATS phase II 92 76 60
CTN0031-STAGE12 80 67 70
CTN0032-HIV rapid testing 983 100 96

Notes: PTSD, Post-Traumatic Stress Disorder; ADHD, Attention Deficit Hyperactivity Disorder.

1

For CTN0015, there were two co-primary endpoints: drug use (61%) and PTSD severity (61%). The analysis used drug use only.

2

For CTN0028, there were two co-primary endpoints: drug use (86%) and ADHD (76%). The analysis used drug use only.

3

For CTN0032, there were two co-primary endpoints: receipt of HIV test result at 1 month (98%) and risky sexual behaviors at 6 months (89%). The analysis used receipt of HIV test result only.