Journal Articles

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    Navigating asthma-the immigrant child in a tug-of-war: A constructivist grounded theory
    (John Wiley and Sons Ltd, 2023-07) Sudarsan I; Hoare K; Sheridan N; Roberts J
    BACKGROUND: Avoidable hospitalisation rates for Indian immigrant children with asthma is high in New Zealand and other Western countries. Understanding how children and their carers manage asthma may lead to a reduction in hospitalisation rates. The topic of asthma and Indian immigrant children's perspectives has not been investigated. Most studies on the topic focus on the experiences of family carers and health professionals. Practice cannot be advanced in the child's best interests unless the child's asthma experiences are explored. The following research addressed this gap by upholding Article 12 of the United Nations Convention on the Rights of the Child, thereby giving Indian immigrant children a voice in describing their asthma experiences. DESIGN: Constructivist grounded theory. METHODS: Intensive interviews were conducted with ten family carers and nine children (eight to 17 years old). Child-sensitive data collection techniques such as drawing, and photography were used to facilitate interviewing children younger than 14 years. The COREQ guidelines guided the reporting of this study. RESULTS: The theory, navigating asthma: the immigrant child in a tug-of-war, is the resulting grounded theory with the tug-of-war being the basic social process. This theory comprises three main categories: being fearful, seeking support and clashing cultures. The data reflected two types of tug-of-war: one between two cultures, the native Indian and the host New Zealand culture and another between family carers' and children's preferences. CONCLUSION: Acculturation and sociocultural factors may significantly influence the asthma experiences of Indian immigrants. RELEVANCE TO CLINICAL PRACTICE: The theory may assist healthcare practitioners to better comprehend Indian immigrants' asthma experiences within their wider sociocultural context. Our research indicates the need for healthcare practitioners to work in partnership with Indian immigrant families to implement culturally safe asthma management strategies.
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    Enhanced airway sensory nerve reactivity in non-eosinophilic asthma
    (BMJ Publishing Group Ltd and the British Thoracic Society, 2/11/2021) Ali H; Brooks C; Crane J; Beasley R; Holgate S; Gibson P; Pattemore P; Tzeng Y-C; Stanley T; Pearce N; Douwes J
    BACKGROUND: Neural mechanisms may play an important role in non-eosinophilic asthma (NEA). This study compared airway sensory nerve reactivity, using capsaicin challenge, in eosinophilic asthma (EA) and NEA and non-asthmatics. METHODS: Thirty-eight asthmatics and 19 non-asthmatics (aged 14-21 years) underwent combined hypertonic saline challenge/sputum induction, fractional exhaled nitric oxide, atopy and spirometry tests, followed by capsaicin challenge. EA and NEA were defined using a sputum eosinophil cut-point of 2.5%. Airway hyperreactivity was defined as a ≥15% drop in FEV1 during saline challenge. Sensory nerve reactivity was defined as the lowest capsaicin concentration that evoked 5 (C5) coughs. RESULTS: Non-eosinophilic asthmatics (n=20) had heightened capsaicin sensitivity (lower C5) compared with non-asthmatics (n=19) (geometric mean C5: 58.3 µM, 95% CI 24.1 to 141.5 vs 193.6 µM, 82.2 to 456.0; p<0.05). NEA tended to also have greater capsaicin sensitivity than EA, with the difference in capsaicin sensitivity between NEA and EA being of similar magnitude (58.3 µM, 24.1 to 141.5 vs 191.0 µM, 70.9 to 514.0) to that observed between NEA and non-asthmatics; however, this did not reach statistical significance (p=0.07). FEV1 was significantly reduced from baseline following capsaicin inhalation in both asthmatics and non-asthmatics but no differences were found between subgroups. No associations with capsaicin sensitivity and atopy, sputum eosinophils, blood eosinophils, asthma control or treatment were observed. CONCLUSION: NEA, but not EA, showed enhanced capsaicin sensitivity compared with non-asthmatics. Sensory nerve reactivity may therefore play an important role in the pathophysiology of NEA.
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    Giving voice to children in research: The power of child-centered constructivist grounded theory methodology
    (Wiley Periodicals LLC, 2022-08) Sudarsan I; Hoare K; Sheridan N; Roberts J
    There has been a growing interest in giving voice to children in response to the introduction of the United Nations Convention on the Rights of the Child and evolving sociological discourses on childhood. Using child-sensitive methodologies such as constructivist grounded theory (CGT) enables children's voices to contribute authentic, meaningful, and eventually more actionable data, capable of informing policies and practices in children's best interests. In this article, we discuss how researchers using CGT can privilege children's voices through effective knowledge coconstruction by creating a child-sensitive research space and using methods that are appropriate to their abilities and interests. We draw on selected data from the first author's (I. S.) PhD project that explores Indian immigrant children's and their family carers' beliefs, practices, and experiences of asthma in New Zealand. We encourage researchers to consider CGT as one of the appropriate methodological choices to explicitly promote the voice of the child.
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    Siblings, asthma, rhinoconjunctivitis and eczema: a worldwide perspective from the International Study of Asthma and Allergies in Childhood.
    (WILEY-BLACKWELL, 2015-01) Strachan DP; Aït-Khaled N; Foliaki S; Mallol J; Odhiambo J; Pearce N; Williams HC; ISAAC Phase Three Study Group
    BACKGROUND: Associations of larger families with lower prevalences of hay fever, eczema and objective markers of allergic sensitization have been found fairly consistently in affluent countries, but little is known about these relationships in less affluent countries. METHODS: Questionnaire data for 210,200 children aged 6-7 years from 31 countries, and 337,226 children aged 13-14 years from 52 countries, were collected by Phase Three of the International Study of Asthma and Allergies in Childhood (ISAAC). Associations of disease symptoms and labels of asthma, rhinoconjunctivitis and eczema were analysed by numbers of total, older and younger siblings, using mixed (multi-level) logistic regression models to adjust for individual covariates and at the centre level for region, language and national affluence. RESULTS: In both age groups, inverse trends (P < 0.0001) were observed for reported 'hay fever ever' and 'eczema ever' with increasing numbers of total siblings, and more specifically older siblings. These inverse associations were significantly (P < 0.005) stronger in more affluent countries. In contrast, symptoms of severe asthma and severe eczema were positively associated (P < 0.0001) with total sibship size in both age groups. These associations with disease severity were largely independent of position within the sibship and national GNI per capita. CONCLUSIONS: These global findings on sibship size and childhood asthma, rhinoconjunctivitis and eczema suggest at least two distinct trends. Inverse associations with older siblings (observations which prompted the 'hygiene hypothesis' for allergic disease) are mainly a phenomenon of more affluent countries, whereas greater severity of symptoms in larger families is globally more widespread.