Andersson-Anvert M, Forsby N, Klein G, et al 1978 ; . The association between undifferentiated nasopharyngeal carcinoma and Epstein-Barr virus shown by correlated nucleic acid hybridisation and histopathological studies. In de-The G, Ito Y eds ; . Nasopharyngeal carcinoma; etiology and control. Lyon IARC Scientific Publication 20, 347-357. Ang K K 1998 ; . Altered fractionation trials in head and neck cancer seminars. Radiat Oncol; 8: 230-236. Boyle P, Macfarlane G J, Zheng T, et al 1992 ; . Recent advances in the epidemiology of head and neck cancer. Curr Opin Oncol; 4: 471-477. British Association of Head and Neck Oncologists 1998 ; . Provision and quality assurance for head and neck cancer care in the United Kingdom a nationally coordinated multi-disciplinary approach. British Association of Otolaryngolgists Head and Neck Surgeons 2000 ; . Effective head and neck cancer management second consensus document.
Correspondence: Pauline Norris, School of Pharmacy, University of Otago, PO Box 913, Dunedin Fax: 03 ; 479 7034; email: pauline.norris stonebow.otago.ac.nz References This new book provides a unified, in-depth, readable introduction to the multipredictor regression methods most widely used in biostatistics: linear models for continuous outcomes, logistic models for binary outcomes, the Cox model for right-censored survival times, repeated-measures models for longitudinal and hierarchical outcomes, and generalized linear models for counts and other outcomes. Treating these topics together takes advantage of all they have in common. The authors point out the many-shared elements in the methods they present for selecting, estimating, checking, and interpreting each of these models. They also show that these regression methods deal with confounding, mediation, and interaction of causal effects in essentially the same way.
Medical School, Hannover, Germany. Seifert.Juergen mh-hannover Abstract: Over the last few years, there has been a growing tendency for opioid addicts to abuse multiple drugs, although many patients are in substitution therapy with methadone. Abuse of multiple drugs leads to a more complicated withdrawal syndrome; it is therefore necessary to investigate new drug strategies as a treatment for detoxification. Buprenorphine appears to be an effective and safe drug in opioid-addicted patient detoxification. In this study, we have compared the short-term efficacy of an 11-day low-dose buprenorphine 14-day carbamazepine regime [BPN CBZ] n 14 ; to 11-day methadone 14-day carbamazepine regime [MET CBZ] n 12 ; in doubledummy, randomized 14-day inpatient detoxification treatment study. Twenty-six inpatients met the DSM-IV criteria for opioid dependence and were included in this study. All patients abused various additional drugs. Fourteen of 26 patients 53.8 % ; completed the study. Seven non-completers seven of 12 58.3 % ; were treated with methadone carbamazepine and five non-completers five of 14 35.7 % ; received buprenorphine carbamazepine, but the difference in the dropout rate was not significant. However, patients with buprenorphine carbamazepine showed significantly fewer withdrawal symptoms after the first two weeks of treatment. The present study supports the hypothesis that buprenorphine carbamazepine is more effective than methadone carbamazepine in detoxification strategies for opioid addict with additional multiple drug abuse. No severe side effects occurred during treatment in either group. ISSN: 0176-3679. Pub Type: Clinical Trial ; Journal Article ; Randomized Controlled Trial. Descriptors: Adult ; Anticonvulsants therapeutic use ; Buprenorphine administration & dosage * therapeutic use ; Carbamazepine therapeutic use ; Double-Blind Method ; Drug Administration Schedule ; Female ; Human ; Male ; Methadone administration & dosage * therapeutic use ; Narcotic Antagonists administration & dosage * therapeutic use ; Narcotics administration & dosage * therapeutic use ; Opioid-Related Disorders * drug therapy ; Substance-Related Disorders drug therapy ; Treatment Outcome. ATTC Buprenorphine Topics: Combined treatment with other therapeutic medications ; Dosing administration ; Pharmacotherapy for opiate dependence 326. Seivewright N ; Iqbal M. 2002 ; Prescribing to drug misusers in practice-often effective, but rarely straightforward. Addict Biol 2002 Jul; 7 3 ; : 26977. Author Address: Substance Misuse Service, Community Health Sheffield NHS Trust, Sheffield, UK. amyh chsheff-tr.trent.nhs Abstract: Many reviews describe the effectiveness of methadone treatment in reducing illicit drug use and associated behaviours among opiate misusers. The strongest evidence includes social outcomes such as reduced debt and crime, and relates overwhelmingly to maintenance rather than detoxification treatment. Drug clinics are often dominated by individuals unable to withdraw fully from methadone, while the "harm reduction" model accepts some ongoing drug use.

Dilute urine, which is recognized by the determination of urine density. In urine with an average density 1.015 ; , the HCG concentration is about 50% of that in serum but the variation is large. If the elevated HCG immunoreactivity in serum is caused by HCGb, its concentration in urine is usually much lower than in serum because most of HCGb is degraded to HCGbcf during excretion into urine Alfthan et al., 1992b ; , and most HCG assays do not measure HCGbcf Cole et al., 2004 ; . Various complement factors react with antibodies, but the effect is highly dependent on the isotype of the antibody used. Thus, mouse IgG2 often reacts with complement. In a sandwich assay, the effect is opposite to that of heterophilic antibodies, i.e. the result is too low because complement reduces the binding capacity of the antibody Bormer, 1989 ; . In an inhibition assay, complement will cause a false-positive result. Because of this, most assay manufacturers avoid using IgG2 antibodies. Serum also contains other factors that non-specifically block the antigenantibody reaction. This effect can be detected as a higher-than-expected result if the sample is diluted in a buffer devoid of protein. This `matrix effect' is usually taken into account by preparing the calibrators in serum devoid of the analyte. However, because the content of interfering factors varies from one sample to another, there is always between-method variation, which is most visible at low concentrations. Therapeutic use of urinary HCG has in rare cases caused induction of antibodies Braunstein, 2002 ; . This will cause a false low result in sandwich assays but falsely elevated results in inhibition assays. With previous models of automatic analyser, carryover of HCG from a pregnancy sample could cause falsely elevated result, but this is presently a rare problem. Contaminants causing errors in label detection is a potential problem in so-called homogeneous assays, i.e. assays without separation of free and bound label. Presently, this assay principle is very rarely used in HCG assays and thus it is not a practical problem. The HCG concentrations in serum increase in the menopause. With sensitive and specific methods, the highest levels observed are 78 IU l, but with other methods, levels up to 15 Snyder et al., 2005 ; and even 25 IU l have been observed Braunstein, 2002 ; . Chemotherapy used to treat malignant tumours often induces gonadal suppression and elevation of serum HCG to postmenopausal levels Stenman et al., 2004 ; . This is important when young women treated for trophoblastic tumours and males treated for testicular cancer are monitored by the determination of serum HCG. In these cases, post-menopausal reference limits need to be applied because the serum concentrations often exceed 35 IU l and occasionally reach levels up to 1015 IU l. This does not need to indicate a relapse but rather a physiological response to gonadal suppression. The condition can be identified by the measurement of serum LH and FSH, the levels of which are post-menopausal. When necessary, suppression of the HCG level by estrogen replacement can be used to identify this iatrogenic HCG elevation Stenman et al., 2004 ; . When HCG treatment is used to induce ovulation, the concentrations in serum increase to 5001000 IU l after injection of 5000 IU and decrease to 5 IU within 812 days Stenman et al., 1997 ; . Athletes may use HCG to stimulate gonadal steroid production for doping purposes, and this may be the cause of an elevated HCG value Braunstein, 2002 and methazolamide.

Injecting drug users with HIV AIDS can be treated successfully for tuberculosis TB ; in methadone treatment programs that provide comprehensive medical care, according to NIDA-supported research. Integrating medical care and drug abuse treatment also has been effective in preventing new cases of TB from developing among HIV-positive patients, the research indicates. "A key to dealing successfully with infectious diseases, such as TB and HIV, among drug abuse patients is the linkage of primary care and drug abuse treatment in a drug abuse treatment setting, " says Dr. Paul A. Coulis of NIDA's Center on AIDS and Other Medical Consequences of Drug Abuse. "In places where this has been done, such as New York City, it has been effective, so we know it works, " he says. TB is a chronic and infectious lung disease. People with latent tuberculosis infection do not have symptoms, may not develop active disease, and cannot spread TB. However, if such individuals do not receive preventive therapy, they may develop active TB, which is contagious. Research has shown that injecting drug users have high rates of latent tuberculosis infection. NIDA-supported studies among injecting drug users have shown that HIV can activate this latent TB infection and increase the risk that active TB will develop. In New York City, which was hard hit by the linked epidemics of HIV and TB during the mid-1980s and early 1990s, 30 percent of persons with active TB were injecting drug users, according to the Centers for Disease Control and Prevention CDC ; . Rates of TB have declined both nationally and in New York City since 1992. However, injecting drug users continue to be at high risk for HIV and tuberculosis. For example, about one-third of the 900 methadone treatment patients in the Montefiore Medical Center's Substance Abuse Treatment Program in The Bronx, New York, have HIV, and TB rates are much higher than they are in the general population, says Dr. Marc Gourevitch, who directs a NIDA-funded study of TB infection in drug users enrolled in the program. "Almost all the active TB cases we see among drug users in our program are among those who are HIV-positive, " Dr. Gourevitch notes and methotrexate.

It should be noted that the FDA's AERS system relies on voluntary participation by providers although reporting is mandatory for events known to a pharmaceutical company that markets the drug in question ; and only a small proportion of all actual cases are submitted, resulting in underreporting, typical for a passive surveillance system. For example, during the early 1970s, Barton 1975 ; obtained information on methadoneassociated deaths by contacting medical examiners and coroners across the U.S. He found that, for 25 areas of the country providing usable data, there were 156 deaths involving methadone in 1971 and 332 such deaths in 1972 a 113 percent increase, possibly due to rapid growth in under-regulated methadone programs during that time. In the FDA data noted above, there were only two cases in 1971 and six cases in 1972 reported via the MedWatch system. Still, AERS data represent a large and long-running passive surveillance system that yields a number of case reports; it is possible that observed trends may be more important than actual numbers of reports for each year. Reports from U.S. poison control centers also show that the overall number of opioidrelated deaths has been on the rise, with many cases involving oxycodone and hydrocodone rather than, or in addition to, methadone Litovitz et al. 2002; Fingerhut and Cox 1998; Cone et al. 2003; Eastwood 1998 ; . This continues a trend that has been developing over a number of years. As shown in Figure 10, virtually all increases in poisoning deaths between 1985 and 1995 involved drugs, with the death rate in males for that category nearly tripling from 5.5 100, 000 population to 16.1 100, 000 ; and the rate and methylcellulose!

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