Table 2.
Summary of the main findings from literature searches (date order)
| Author (year) | Year | Rural/Urban | Mean Age (years) | Setting and study design | Sample size | Assessment methods |
|---|---|---|---|---|---|---|
| Paediatric | ||||||
| Zverev | 2001 | Urban | Children in primary school, children from each class were randomly selected | 539 | Peak expiratory flow only. No symptoms questionnaires. No spirometry | |
| Cook | 2013 | Urban clinic | 11.5 | Consecutive recruitment from paediatric Sickle Cell Anaemia Clinic | 25 | Self-reported respiratory symptoms (ISAAC questionnaire) and spirometry. |
| Mwalukomo | 2016 | Urban clinic | 11.1 | First 3 eligible patients at paediatric HIV clinic per day were recruited | 160 | Self-reported respiratory symptoms and clinical observation and spirometry |
| Lelijveld | 2017 | Urban hospital | Cases: consecutive patients admitted with severe acute malnutrition in 2006–2007. Sibling controls: closest in age to case. Community controls: random direction selected from case home then door-to-door recruitment (age- & sex-matched). | 320 cases (of 477 alive 1 year after original discharge); 217 sibling controls; 184 community controls | Spirometry | |
| Rylance | 2019 | Rural | 7.1 | Population sampling with control and intervention arm | 804 including 476 (260 intervention and 216 control) from CAPS households | Self-reported respiratory symptoms (BOLD questionnaire) and spirometry |
| Adult | ||||||
| Fullerton | 2011 | Rural/urban | 39 | Cross-sectional survey. Rural: first household semi-randomly selected, then snowballing sampling strategy. | 374 | Self-reported respiratory symptoms and diagnoses and spirometry. |
| Urban: randomly selected from 360 research volunteers, then snowballing sampling strategy. | ||||||
| Biased selection toward women | ||||||
| To | 2012 | Rural/urban | Multi-stage cluster design: random | 3890 | Self-reported respiratory symptoms and diagnoses and self-reported doctor diagnosed. | |
| Jary | 2014 | Rural | 35 | Community based survey of women wishing to purchase a cookstove - not randomly selected. | 51 | Self-reported respiratory symptoms. |
| Meghjia | 2016 | Urban | 42 | Random sample from enumerated population - age- and sex-stratified population-representative sample. | 1059 (of 1240 eligible) | Self-reported respiratory symptoms (BOLD questionnaire) and spirometry. |
| Manjomo | 2016 | Urban | All patients registered with NCDs attending a chronic care clinic at a primary health care centre. | 1135 | Diagnosis of asthma at clinic | |
| Wang | 2016 | Rural | Cross sectional survey, from three districts. Sampling method unclear. Paediatric adult overlap with participant 10–65 years old. | 5643 individuals from 1199 households | Self-reported chronic respiratory symptoms reported as a group | |
| Banda | 2017 | Rural | 36 | Population proportional sampling using electronic satellite maps: 30 villages randomly selected from each cluster (27 health centre catchment population), 7 households randomly selected from each village. | 15795 individuals from 6304 households with 1728 who had health passports checked for symptoms | Self-reported respiratory symptoms / health passport assessment of symptoms. |
| Das | 2017 | Rural/peri-urban | 37.3 | Random sample of households from representative villages. | 655 households (382 rural, 273 peri-urban). | Self-reported respiratory symptoms. |
a
From the same study population.