Paracetamol use in early life and asthma: prospective birth cohort studyPembimbing: dr. Rahmat Gumilar,Sp.A dr. H. Manan Affandi, Sp.A dr. Mustakim, Sp.A, M.Kes dr. Tina Ramayanthi, Sp.A Disusun Oleh : Izza Ayudia Hakim (1102009150) Abstract Objective To determine if use of paracetamol in early life is an independent risk factor for childhood asthma. Design Prospective birth cohort study. Setting Melbourne Atopy Cohort Study. Participants 620 children with a family history of allergic disease, with paracetamol use prospectively documented on 18 occasions from birth to 2 years of age, followed until age 7 years. Main outcome measures The primary outcome was childhood asthma, ascertained by questionnaire at 6 and 7 years. Secondary outcomes were infantile wheeze,allergic rhinitis, eczema, and skin prick test positivity. 80% (495/620) were followed up. 30% (148) had current asthma. per doubling of days of use). 95% confidence interval 1.39. .00 to 1.18. Between 6 and 7 years. Results Paracetamol had been used in 51% (295/575) of children by 12 weeks of age and in 97% (556/575) by 2 years. Increasing frequency of paracetamol use was weakly associated with increased risk of childhood asthma (crude odds ratio 1. However. Paracetamol use for non-respiratory causes was not associated with asthma (crude odds ratio 0. 0. this association essentially disappeared (odds ratio 1.95. . after adjustment for frequency of respiratory infections.12).91 to 1.81 to 1.08. 0.29). These findings suggest that early paracetamol use does not increase the risk of asthma. no association was found between early paracetamol use and risk of subsequent allergic disease after adjustment for respiratory infections or when paracetamol use was restricted to non-respiratory tract infections. . Conclusions In children with a family history of allergic diseases. eczema. and allergic rhinitis in some children. -Decreased glutathione concentrations may also induce a shift from a T helper cell type 1 response to a T helper cell type 2 responsewith cytokine production favouring the development of allergic disease. Some evidence suggests that ingestion of paracetamol in early life may cause asthma.Introduction INTRODUCTION -Paracetamol (acetaminophen) is the most commonly used analgesic in young children. . . particularly in the first two years of life during pulmonary development. if paracetamol is a cause of asthma its use needs to be urgently re-evaluated. Given the current global burden of asthma. . we analysed whether use of paracetamol in infancy influenced the subsequent development of asthma and allergic diseases according to indication for use. In a birth cohort of infants at high risk of developing atopic conditions. Will consumt paracetamol in early life caused asthma for childhood ? . Infants were eligible to be enrolled if one or more of their first degree family members had eczema. Australia. . The recruitment process has been described in more detail elsewhere. allergic rhinitis. asthma.Methods The Melbourne Atopy Cohort Study recruited 620 infants before birth. between 1990 and 1994 in Melbourne.All mothers gave informed consent. or severe food allergy. an allergy trained nurse (CA) did a telephone survey every four weeks until the age of 64 weeks and then at 78 weeks and at 2 years (a total of 18 times). . After the birth of the infant. . asthma.Inclusion criteria Infants were eligible to be enrolled if one or more of their first degree family members had eczema. allergic rhinitis. or severe food allergy. . and six were missed at 2 years but rejoined the study after this time). 575 (92. 14 refused participation. 37 refused participation).8%) completed a follow-up at either 6 or 7 years or both (88 lost.7%) were followed to age 2 years (25 were lost to follow-up.Atotal of 495 (79. Study population and paracetamol exposure Of the 620 infants in the Melbourne Atopy Cohort Study. . Of the children exposed to paracetamol within the first two years. . 556/575) infants received paracetamol during the first two years of life (table 2). Each child potentially had from zero to a maximum of 730 (2×365) “total days” of paracetamol use in the first two years of life. the median total number of days of exposure was 17 (10-27).Case management protocol Almost all (97%. This included exposure to any preparation that contained paracetamol. We recorded the number of days of exposure to paracetamol for each child (regardless of dose or frequency per day) within the first two years of life. The median age at first exposure was 12 (interquartile range 12-20) weeks (fig 1). Results . . we found no evidence of such an association after adjustment for history of early infections. this prospective cohort study found evidence of a crude association between paracetamol use in early life and increased risk of asthma. However. .Discussion Consistent with previous studies in this area. nor when the association was limited to paracetamol use for non-respiratory tract illness. Moreover. . increasing days of use for these indications did not increase the risk of allergic disease. although use of paracetamol for lower respiratory tract infections and wheeze was associated with increased risk of allergic disease. We conclude that paracetamol use in early life is not an independent risk factor for childhood asthma. 26 for a substantial increase in paracetamol exposure for nonrespiratory indications (exposure shifted from 4 days (25th centile) to 11 days (75th centile). our data are consistent (95% confidence interval) with an adjusted odds ratio between 0.76 and 1. based on the adjusted odds ratio . . For the outcome of asthma. Conclusion In children with a family history of allergic diseases. no association was found between early paracetamol use and risk of subsequent allergic disease after adjustment for respiratory infections or when paracetamol use was restricted to non-respiratory tract infections. These findings suggest that early paracetamol use does not increase the risk of asthma. . THANK YOU .