Effect of the Duration of INH Therapy on the Prevention of Active TB
	TB Case Rates     Reduction in TB                            Placebo    INH   (10 yr. follow-up) Patients taking >80% of medication for:    10-12 mo     24.9        7.9     68.3    0 - 9 mo     18.6      15.6     16.1 Patients taking medication >10 months compliant for:    60%-79%      26.2      11.2     57.3    40%-59%      19.0        9.1      52.1 Ferebee, SH. Adv Tub Res 1970;17:28-106