Symptoms and functional limitations related to respiratory health and carbon monoxide poisoning in Tanzania: a cross sectional study

Table 6 Multivariate linear regression analysis for risk factors of pulmonary obstruction as determined by FEV1/FVC ratio post bronchodilator (dependent variable) in participants without active smoking status and with available and valid spirometry data (N = 589). FEV1/FVC is decreasing physiologically with age; this variable and also sex were included into the analysis. A model was fitted using stepwise variable selection. The final model included the variables listed in the table

Variable	Regression coefficient	Standardized regression coefficient	p	CI₉₅ _{lower limit}	CI₉₅ _{upper limit}
Age	-0.001	-0.29	< 0.01	-0.001	-0.001
SpCO	< 0.001	-0.08	0.05	-0.001	< 0.001

ISSN: 1476-069X