At 3 months after entry into the study, 51% of patients with disease of idiopathic etiology (21 of the 41 evaluable patients from both groups) showed improvement based on investigator's evaluation of transfusion requirements and peripheral blood counts. Hematological response rate (complete/moderate based on sponsor's evaluation) at 3 months for the ATGAM and androgen group was 44% compared with 43% for the group receiving ATGAM, androgen and bone marrow infusion. The group of patients who received mismatched bone marrow infusion had better estimated 1-year survival rate, although the difference between these estimates was not statistically significant (p=); 83% at 12 months for the group receiving bone marrow infusion versus 59% for the ATGAM and androgen alone group. Estimated 1-year survival rate for both groups combined was 73%.
A system of standardizing the PT in oral anticoagulant control was introduced by the World Health Organization in 1983. It is based upon the determination of an International Normalized Ratio (INR) which provides a common basis for communication of PT results and interpretations of therapeutic ranges. The INR system of reporting is based on a logarithmic relationship between the PT ratios of the test and reference preparation. The INR is the PT ratio that would be obtained if the International Reference Preparation (IRP), which has an ISI of , was used to perform the test. Early clinical studies of oral anticoagulants, which formed the basis for recommended therapeutic ranges of to times control mean normal PT, used sensitive human brain thromboplastin. When using the less sensitive rabbit brain thromboplastins commonly employed in PT assays today, adjustments must be made to the targeted PT range that reflect this decrease in sensitivity.
Physicians today are alert to requests from patients for narcotics or benzodiazepines and are rightly concerned about the addictive potential of these drugs.  However, relatively few physicians are aware of the addictive potential of skeletal muscle relaxants. Lack of awareness on the part of physicians of the potential for skeletal muscle relaxant abuse contributes to the problem. The fact that these drugs are not controlled substances may lead to complacency on the part of prescribers. Some of the drugs, such as carisoprodol, may even be ordered by mail through veterinary supply houses.