ABSTRACT
OBJECTIVES: This study aimed to evaluate the association between presence of depression symptoms and the exposure level to insecticides among aged population in rural area, determined via measured levels of urinary 3-phenoxybenzoic acid (3-PBA), after controlling for socioeconomic confounding factors. METHODS: Using a cross-sectional study design, we randomly recruited participants for our study (161 male and 239 female) from rural areas of Asan, Chungnam, Korea. Environmental risk factor exposure was assessed using a questionnaire, and gas chromatography- mass spectrometry was used to analyze urinary 3-PBA levels. We used a logistic regression analysis to assess the association of urinary 3-PBA levels with the presence of self-reported depression symptoms. RESULTS: After controlling for creatinine levels, the median (interquartile range) concentration of 3-PBA was approximately 1.5 times (p<0.05) higher among female (1.54 [0.90 to 2.35]) mug/g) than among male (1.06 [0.64 to 1.81] mug/g). Our study found that among female participants, the unit increase in 3-PBA levels exhibited a likely positive association (odds ratio, 1.12; 95% confidence interval, 1.00 to 1.25) with an increased risk of presence of self-reported depression symptoms, after adjusting for socioeconomic insurance type, daily physical condition, marital status, smoking status, and age. CONCLUSIONS: Given our finding of a potential association between the presence of selfreported depression symptoms and 3-PBA levels, precautions should be considered to minimize exposure to insecticides and thus protect the health of aged residents in rural areas.
Subject(s)
Aged , Female , Humans , Male , Creatinine , Cross-Sectional Studies , Depression , Insecticides , Insurance , Korea , Logistic Models , Marital Status , Mass Spectrometry , Risk Factors , Smoke , SmokingABSTRACT
OBJECTIVES: This study aimed to evaluate the association between presence of depression symptoms and the exposure level to insecticides among aged population in rural area, determined via measured levels of urinary 3-phenoxybenzoic acid (3-PBA), after controlling for socioeconomic confounding factors. METHODS: Using a cross-sectional study design, we randomly recruited participants for our study (161 male and 239 female) from rural areas of Asan, Chungnam, Korea. Environmental risk factor exposure was assessed using a questionnaire, and gas chromatography- mass spectrometry was used to analyze urinary 3-PBA levels. We used a logistic regression analysis to assess the association of urinary 3-PBA levels with the presence of self-reported depression symptoms. RESULTS: After controlling for creatinine levels, the median (interquartile range) concentration of 3-PBA was approximately 1.5 times (p<0.05) higher among female (1.54 [0.90 to 2.35]) mug/g) than among male (1.06 [0.64 to 1.81] mug/g). Our study found that among female participants, the unit increase in 3-PBA levels exhibited a likely positive association (odds ratio, 1.12; 95% confidence interval, 1.00 to 1.25) with an increased risk of presence of self-reported depression symptoms, after adjusting for socioeconomic insurance type, daily physical condition, marital status, smoking status, and age. CONCLUSIONS: Given our finding of a potential association between the presence of selfreported depression symptoms and 3-PBA levels, precautions should be considered to minimize exposure to insecticides and thus protect the health of aged residents in rural areas.
Subject(s)
Aged , Female , Humans , Male , Creatinine , Cross-Sectional Studies , Depression , Insecticides , Insurance , Korea , Logistic Models , Marital Status , Mass Spectrometry , Risk Factors , Smoke , SmokingABSTRACT
BACKGROUND: Rapid and sensitive detection of KRAS mutation is needed to maximize the benefits for patients who are being treated with monoclonal antibodies to target the epidermal growth factor receptor in colorectal cancer. The aim of this study is to evaluate the efficacy of the peptide nucleic acid clamp real-time PCR (PCqPCR) as compared to that of direct sequencing (DS) between using fresh colorectal cancer tissue and the matched formalin-fixed and paraffin-embedded (FFPE) colorectal cancer tissue. METHODS: The efficacy of PCqPCR was evaluated and compared with that of DS using fresh tissue and matched FFPE tissue from 30 cases of colorectal cancer. RESULTS: PCqPCR is more sensitive than DS for detecting KRAS mutation. PCqPCR detected 1% of mutants in 1 ng DNA. PCqPCR detected mutation in 1% of mutant cells, while DS barely detected, by manual reading, that in 20-50% of mutant cells. In the clinical samples, PCqPCR detected KRAS mutation in 60.0% while DS detected KRAS mutation in 53.3% of the colorectal cancers. The two methods showed a 100% concordance rate for detecting KRAS mutation between the fresh tissue and FFPE tissue. CONCLUSIONS: The PCqPCR method is efficiently applicable for the detection of KRAS mutation in a clinical setting.
Subject(s)
Humans , Antibodies, Monoclonal , Colorectal Neoplasms , DNA , Paraffin , Peptide Nucleic Acids , Polymerase Chain Reaction , Real-Time Polymerase Chain Reaction , ErbB ReceptorsABSTRACT
PURPOSE: Kidney length and volume are important parameters in the diagnosis of kidney disease. There has been no study for kidney volume in Korea. Therefore, we investigated the normal kidney volume and length using multidetector-row computerized tomography (MDCT). METHODS: One hundred and twenty-three Koreans were scanned for various medical reasons by MDCT. We measured kidney volume with three dimensional reconstruction programs. In the coronal section, we measured the craniocaudal length of both kidneys. Cross sectional kidney size was defined the sum of both sides of the rectangle enclosing the kidney at the level of the renal (hilum) vessel. Patients were excluded when they have the estimated GFR, calculated by modification of diet in renal disease, less than 90 ml/min/1.73m2, diabetes, any urinary abnormalities, renal anatomical abnormality, renal artery disease, more than three cysts and larger than 3 cm of cyst. RESULTS: Kidney volumes were 177+/-34 mL for men and 146+/-28 mL for women. There were no volume differences among age groups. Kidney lengths were 10.5+/-0.9 cm for left and 10.0+/-0.8 cm for right. The cross sectional kidney size was 10.8+/-1.1 cm for left and 10.7+/-1.0 cm for right. There was a high correlation between the kidney volumes and the cross sectional sizes (r=0.80). CONCLUSION: We suggest the reference values for kidney volume and length using MDCT. Measurement of kidney volumes may be more helpful to determine diagnosis and treatment of chronic kidney disease as compared with that of simple measuring kidney length.