An increased risk of reversible dementia may occur after zolpidem derivative use in the elderly population: a population-based case-control study.
An increased risk of reversible dementia may occur after zolpidem derivative use in the elderly population: a population-based case-control study.

We evaluate the effects of zolpidem use to develop dementia or Alzheimer disease from the Taiwan National Health Insurance Research Database (NHIRD).A retrospective population-based nested case-control study. Newly diagnosed dementia patients 65 years and older and controls were sampled. A total of 8406 dementia and 16,812 control subjects were enrolled from Taiwan NHIRD during 2006 to 2010. The relationships between zolpidem use and dementia were measured using odds and adjusted odds ratios. The relationship between the average cumulative doses for zolpidem and dementia was also analyzed.Zolpidem alone or with other underlying diseases, such as hypertension, diabetes, and stroke, was significantly associated with dementia after controlling for potential confounders, such as age, sex, coronary artery disease, diabetes, anti-hypertension drugs, stroke, anticholesterol statin drugs, depression, anxiety, benzodiazepine, anti-psychotic, and anti-depressant agents' use (Adjusted OR = 1.33, 95% CI 1.24-1.41). Zolpidem use also has significant dose-response effects for most of the types of dementia. In patient with Alzheimer diseases, the effects of zolpidem among patients with Alzheimer's disease remained obscure. The adjusted OR for patients whose cumulative exposure doses were between 170 and 819 mg/year (adjusted OR: 1.65, 95% CI 1.08-2.51, P = 0.0199) was significant; however, the effects for lower and higher cumulative dose were not significant.Zolpidem used might be associated with increased risk for dementia in elderly population. Increased accumulative dose might have higher risk to develop dementia, especially in patients with underlying diseases such as hypertension, diabetes, and stroke.

An Independent Risk of Gout on the Development of Deep Vein Thrombosis and Pulmonary Embolism: A Nationwide, Population-Based Cohort Study.
An Independent Risk of Gout on the Development of Deep Vein Thrombosis and Pulmonary Embolism: A Nationwide, Population-Based Cohort Study.

Previous studies indicated that gout is a risk factor of cardiovascular diseases. This study aimed to determine if patients with gout have an increased risk of deep vein thrombosis (DVT) or pulmonary embolism (PE).We used the Longitudinal Health Insurance Database, a subset of the national insurance claim dataset, which enrolled 1 million Taiwanese to identify 57,981 patients with gout and 115,961 reference subjects matched by sex, age, and entry date of diagnosis. The risk of DVT and PE was analyzed using the Cox proportional hazards model.In this Taiwanese dataset observed from 2000 to 2010, we found the incidence of DVT was 5.26 per 10 person-years in the gout cohort, which was twofold higher than the incidence of 2.63 per 10 person-years in the reference cohort. After adjusting for age, sex, and 9 comorbidities, the hazard ratio (HR) of developing DVT was 1.66 (95% confidence interval [CI] = 1.37-2.01). Among patients with gout, the youngest age group had the highest increase in the risk of developing DVT (HR [95% CI] = 2.04 [1.24-3.37] for ages 20 to 49 years, 1.80 [1.28-2.51] for ages 50 to 64 years, and 1.45 [1.11-1.91] for ages ≥65 years). The incidence of PE was about one-fifth that of DVT in gout patients, but the effect of gout on the risk was similar (HR [95% CI] = 1.53 [1.01-2.29]).Our analysis confirmed that gout increased the risk of DVT and PE. Further exploration is needed in the future.

Angiotensin-converting enzyme inhibitors and bacterial pneumonia in patients with Parkinson disease.
Angiotensin-converting enzyme inhibitors and bacterial pneumonia in patients with Parkinson disease.

BACKGROUND:

To evaluate the association of angiotensin-converting enzyme inhibitors and angiotensin II receptor blockers with pneumonia development in patients with Parkinson's disease (PD).

METHODS:

The study cohort consisted of patients aged 50 years or older who were initially diagnosed with PD and had hypertension. We assessed the patients' exposure statuses and accumulated doses of angiotensin-converting enzyme inhibitors and angiotensin II receptor blockers. We then evaluated the risk of pneumonia development in the patients who were exposed to these drugs and those who were not.

RESULTS:

We examined 2,310 patients. During the observation period, 608 patients developed pneumonia. Angiotensin-converting enzyme inhibitors were associated with a lower risk of pneumonia. This association was dose-dependent.

CONCLUSION:

Angiotensin-converting enzyme inhibitor use was associated with a dose-dependent reduction in the risk of pneumonia in patients with PD and hypertension.

Antiarrhythmic agents and the risk of malignant neoplasm of liver and intrahepatic bile ducts.
Antiarrhythmic agents and the risk of malignant neoplasm of liver and intrahepatic bile ducts.

BACKGROUND:

The objective of this study was to determine the association between the use of antiarrhythmic agents and the risk of malignant neoplasm of liver and intrahepatic bile ducts (MNLIHD).

METHODS:

We used the research database of the Taiwan National Health Insurance Program to conduct a population-based, case-control study. We identified 9944 patients with antiarrhythmic history who were first diagnosed as having MNLIHD between 2005 and 2010. We identified an additional 19,497 patients with antiarrhythmic history in the same period who did not develop MNLIHD and were frequency-matched using age, sex, and index year to form a control group. Five commercially available antiarrhythmic agents, amiodarone, mexiletine, propafenone, quinidine, and procainamide, were analyzed.

RESULTS:

The adjusted odds ratio (OR) of MNLIHD was 1.60 (95% confidence interval [CI], 1.45-1.77) for amiodarone users versus nonamiodarone users. In subgroup analysis, amiodarone use was significantly associated with an increased risk of MNLIHD with an adjusted OR of 18.0 (95% CI, 15.7-20.5) for patients with comorbidities compared to an OR of 2.43 (95% CI, 1.92-3.06) for those without comorbidities. After adjustment for age, sex, statins, anti-diabetes medications, non-steroidal antiinflammatory drugs, propafenone use, quinidine use, and comorbidities, the ORs were 1.49, 1.66, and 1.79 for MNLIHD associated with annual mean defined daily doses of ≤ 30, 31-145, and >145, respectively.

CONCLUSIONS:

The results of the present study indicated that amiodarone might be associated with the development of MNLIHD in a dose-dependent manner, particularly among patients with comorbidities.

Anti-tuberculosis treatments and risk of hepatocellular carcinoma in tuberculosis patients with liver cirrhosis: a population-based case-control study.
Anti-tuberculosis treatments and risk of hepatocellular carcinoma in tuberculosis patients with liver cirrhosis: a population-based case-control study.

The objective of this study was to evaluate the association between the use of anti-tuberculosis (anti-TB) agents, isoniazid (INH), rifampicin (RIF), and their combination (INH + RIF), and the risk of hepatocellular carcinoma (HCC) in cirrhotic patients. This population-based case-control study was conducted using a research database of Taiwan's National Health Insurance program. Cirrhotic patients first diagnosed with HCC between 1996 and 2011 (n = 50,351), among whom 4,738 were anti-TB medication users, were evaluated. Cirrhotic patients who did not develop HCC within the same period, frequency-matched according to age, sex, and index year, were evaluated as the control group (n = 47,488). The adjusted odds ratio (OR) of HCC was 1.34 [95 % confidence interval (CI), 1.20-1.50] in INH + RIF users compared with non-INH + RIF users. Long-term (>12 months) use of INH, RIF, and INH + RIF was significantly associated with increased risk of HCC, with an adjusted OR of 3.51 (95 % CI, 2.11-5.84), 4.17 (95 % CI, 2.76-4.31), and 7.17 (95 % CI, 4.08-12.6), respectively, after adjusting for age, sex, and comorbidities. An average dose of INH + RIF >16,050 mg/year was associated with increased risk of HCC in cirrhotic patients, with an adjusted OR of 1.48 (95 % CI, 1.27-1.73). Our results indicate that cirrhotic patients with long-term or high-dose INH and RIF treatment, particularly their combination, are associated with increased risk of HCC development.