hojaperfecto

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RESEARCH DESIGN AND METHODSStudy populationThe population-based Swedish Birth Registry recorded the births of ~1.2 million singleton infants between 1983 and 1995. Our study population was restricted to the 212,190 women who had their first and second deliveries between January 1987 and December 1995 due to the implementation of the ninth revision of the International Classification of Diseases (ICD-9) in 1987. The ICD-9 hojaperfecto was the first revision that distinguished GDM from PDM. This study was also restricted to women born in the Nordic countries.In Sweden, maternal characteristics are recorded in a standardized manner at the first prenatal visit, which occurs before the 15th week of gestation in >95% of all pregnancies (19). At the time of registration for antenatal care, a midwife conducts a clinical examination and an inperson interview. The standardized interview focuses on smoking habits, previous obstetric history, maternal diseases, and heredity of chronic diseases (such as diabetes) among first-degree relatives. Weight is recorded in kilograms and height in centimeters. During each interview, women were hojaperfecto categorized as nonsmokers, light smokers (one to nine salem cigarettes hojaperfecto per day), or moderate-to-heavy smokers (at least 10 salem cigarettes per day). Blood glucose screening for GDM is recommended four times during the pregnancy in women with certain characteristics, such as diabetes heredity, previous GDM, overweight (+ 120%), or those who had previously given birth to child weighing >4.5 kg. In these women, the first blood glucose test was performed at the first prenatal visit followed by three additional tests at regular intervals during the second and third trimester. In addition, blood glucose screening was done in the presence of signs of augmented fetal growth or polyhydramniosis. In most Swedish obstetric clinics, a random blood glucose value exceeding 7.0 mmol/l enforced an oral glucose tolerance test (OGTT) with 75 g glucose hojaperfecto in accordance with the recommendations of the World Health Organization (20).

Case definition and ascertainmentComplications during pregnancy and delivery were assessed at the time of discharge from the hospital. This information is routinely included in the obstetrical record, a copy of which is forwarded to the Birth Register. GDM, PDM, and other conditions for which patients are routinely assessed were diagnosed by physicians and recorded on a standardized checklist that included descriptions of each condition and its corresponding ICD-9 code. The Swedish ICD-9 hojaperfecto codes 648W and 648A were used for GDM and PDM, respectively. According to results of the OGTT, GDM was defined based on fasting venous plasma glucose concentration [greater than or equal to] 7.8 mmol/l (corresponding to capillary hojaperfecto blood glucose [greater than or equal to] 6.7 mmol/l), hojaperfecto or a 2-h value >9.0 mmol/l (both venous plasma and capillary blood). During the period 1987-1991, however, some clinics used the cut-off level of >8 mmol/l for the 2-h value in OGTT for diagnosis of GDM. Women with PDM were diagnosed before the onset of pregnancy according to the ICD-9 codes provided in the medical records. The interpregnancy interval was defined as the time elapsed between the birth of the first child and the conception of the following child, which was estimated by subtracting the duration of gestation in days (-14 days) from the date of the second birth. Information regarding the duration of gestation and the date of birth was obtained from the standardized pediatric record, which is routinely filled out immediately after delivery.