Table 4

Crude and adjusted linear regression analysis of respiratory symptoms with percentage predicted lung volumes, taluka Gambat district Khairpur, Sindh, Pakistan
Crude beta coefficient (Confidence interval) Adjusted beta coefficient* (Confidence interval) P - value
% Predicted FVC volumes
Cough 21 −7.537 (−15.53 – 0.45) −9.353(−17.30 – -1.39) 0.021
Phlegm 22 −7.100 (−14.73 – 0.53) −9.792 (−17.55 – -2.02) 0.014
Wheeze −16.190 (−24.65 – -7.72) −17.876 (−26.13 – -9.61) < 0.001
Shortness of breath 23 −12.191 (−22.09 – -2.28) −8.965 (−19.09 – -1.16) 0.082
% Predicted FEV1 volumes
Cough −12.969 (−20.91 – -5.02) −14.510 (−22.52 – -6.49) <0.001
Phlegm −11.631 (−19.24 – -4.01) −13.814 (−21.70 – -5.92) 0.001
Wheeze −20.068 (−28.46 – -11.66) −22.120 (−30.41 – -13.82) < 0.001
Shortness of breath −13.967 (−24.59 – -3.33) −15.176 (−25.08 – -5.267) 0.003
% Predicted FEV1/FVC ratio
Cough −7.876 (−12.34 – -3.41) −6.841 (−11.16 – -2.51) 0.002
Phlegm −6.936 (−11.22 – -2.65) −6.778 (−11.09 – -2.46) 0.002
Wheeze −7.765 (−12.65 – -2.87) −8.245 (−13.21 – -3.27) 0.001
Shortness of breath −7.327 (−12.97 – -1.68) −7.403 (−13.21 – -1.59) 0.013

*Adjusted for age, height, weight, sex, smoking status, education, socioeconomic status, spoken dialect and arsenic levels.

21. Chronic cough defined as cough on most days of month, for 3 consecutive months or more in a year.

22. Chronic phlegm defined as presence of phlegm for 3 consecutive months in 2 consecutive years.

23. Participants were asked: do you have to walk slower than people of your age on the level because of breathlessness (SOB grade II).

Abbasi et al.

Abbasi et al. BMC Pulmonary Medicine 2012 12:81   doi:10.1186/1471-2466-12-81

Open Data