Little is known about the effect of exposure to cooking oil fumes (COFs) on the development of non-malignant respiratory diseases in nonsmoking women. This study investigated the relationship between exposure to COFs and chronic bronchitis in female Taiwanese non-smokers. Searching the 1999 claims and registration records maintained by Taiwan’s National Health Insurance Program, we identified 1846 women aged 40 years or older diagnosed as having chronic bronchitis (ICD-9 code: 491) at least twice in 1999 as potential study cases and 4624 women who had no diagnosis of chronic bronchitis the same year as potential study controls. We visited randomly selected women from each group in their homes, interviewed to collect related data including cooking habits and kitchen characteristics, and them a spirometry to collect FEV1 and FVC data between 2000 and 2009. After the exclusion of thirty smokers, the women were classified those with chronic bronchitis (n = 53), probable chronic bronchitis (n = 285), and no pulmonary disease (n = 306) based on physician diagnosis and American Thoracic Society criteria. Women who had cooked ≥ 21 times per week between the ages of 20 and 40 years old had a 4.73-fold higher risk of chronic bronchitis than those cooking < 14 times per week (95% CI = 1.65–13.53). Perceived kitchen smokiness was significantly associated with decreased FEV1 (− 137 ml, p = 0.021) and FEV1/FVC ratio (− 7.67%, p = 0.008). Exposure to COF may exacerbate the progression of chronic bronchitis in nonsmoking women.

Melamine exposure remains common even after the 2008 melamine-tainted baby formula incident, which resulted in 6 deaths and approximately 50 000 hospitalizations.¹ A continuous low-dose melamine exposure has been linked to urolithiasis in both children and adults.^2,3 Another source of melamine exposure is melamine tableware.⁴ In a pilot study, we asked 16 healthy volunteers (age range, 20-27 years) to consume 500 mL of hot noodle soup (initial temperature, 90°C) served in melamine bowls in the morning of October 2011. We collected from each participant 1 spot urine sample immediately before and at 2-hour intervals for 12 hours after consuming the noodle soup. This experiment simulated the natural situation; thus, not all participants provided urine samples at every 2-hour interval. However, all urine samples from all participants were collected after consumption for 12 hours. Postconsumption mean urinary melamine concentrations, corrected for urinary creatinine, initially increased sharply, peaked at 4 to 6 hours, and then declined sharply for 2 hours and then less steeply for the remainder of the monitoring period (eFigure 1). We therefore investigated if consumption of hot noodle soup served in melamine bowls would increase total urinary melamine excretion.

To determine if both gestational diabetes mellitus (GDM) and maternal overweight/obesity are independently associated with delivery of large-for-gestational-age (LGA) babies in Taiwan. Anthropometric parameters were measured and 75-g oral glucose-tolerance tests were administered to a cohort of 1428 pregnant women at 24-28 weeks gestation at nine hospitals in Taiwan. GDM was diagnosed based on the International Association of Diabetes and Pregnancy Study Groups criteria. Reported pre-pregnancy BMI and measured BMI during pregnancy were recorded at the late stage of the second trimester and the third trimester. Neonatal anthropometrics were measured at delivery. Primary outcome was LGA, defined in this study as having a birth weight ≥90th percentile for gestational age defined by WHO or a Chinese growth reference, taking into consideration the racial/ethnic and environmental differences in growth around the world. Multiple logistic regression was used to examine associations of GDM and maternal overweight/obesity with outcomes. Based on WHO growth reference definition of LGA, subjects with pre-pregnancy BMI ≥24 and pregnancy BMI >28.4 were found to be 2.46 times (0.76-7.97) and 3.28 times (1.01-10.60), respectively, more likely to deliver LGA babies than subjects with normal pre-pregnancy and pregnancy BMIs. Compared to those without GDM, subjects with GDM were 7.55 (1.62-35.25) times more likely to deliver LGA babies. The odds ratios for delivering a baby with a birth weight ≥90th percentile were 11.40 (1.65-78.75) for those with GDM alone, 4.10 (1.07-15.65) for those with overweight/obesity alone and 15.75 (1.30-190.40) for those with both GDM and overweight/obesity, compared to those with no GDM and no overweightness. Women with both pre-pregnancy and pregnancy overweightness/obesity were 3.64 (1.07-12.34) times more likely to deliver LGA. The above results remained similar when analyzing data based on Chinese growth reference definition of LGA. Maternal overweightness/obesity and GDM are independently associated with LGA. Their combination had a greater impact than either one alone.