TABLE 2

Demographics of patients presenting to healthcare facilities with respiratory symptoms

All participants (n=977)Central/provincial facilities (n=487)District facilities (n=405)Commune facilities (n=85)
Age years59 (47–67)57 (42–66)60 (50–67)61 (52–68)
Male sex643 (65.8)333 (68.4)250 (61.7)60 (70.6)
Body mass index#21.7 (19.0–24.1)20.8 (18.4–23.6)22.4 (20.2–24.6)21.7 (19.4–24.1)
Highest education level
 Primary365 (38.6)178 (38.5)156 (39.0)31 (36.9)
 Secondary480 (50.7)224 (48.5)208 (52.0)48 (57.2)
 University92 (9.7)54 (11.7)33 (8.3)5 (6.0)
 Unknown/no answer9 (1.0)6 (1.3)3 (0.8)0 (0.0)
Comorbidity
 Heart disease150 (15.9)80 (17.3)60 (15.0)10 (11.9)
 Hypertension285 (30.1)115 (24.9)141 (35.3)29 (34.5)
 Diabetes74 (7.8)36 (7.8)30 (7.5)8 (9.5)
 Asthma, asthmatic bronchitis or allergic bronchitis142 (15.0)73 (15.8)55 (13.8)14 (16.7)
 COPD93 (9.8)50 (10.8)38 (9.5)5 (6.0)
 Chronic bronchitis175 (18.5)88 (19.1)68 (17.0)19 (22.6)
 History of tuberculosis119 (12.6)63 (13.6)41 (10.3)7 (8.3)
Smoking history
 Male
  Current smoker318 (51.2)165 (52.1)113 (46.1)40 (67.8)
  Ex-smoker169 (27.2)89 (28.1)68 (27.8)12 (20.3)
  Never smoked134 (21.6)63 (19.9)64 (26.1)7 (11.9)
 Female
  Current smoker3 (0.9)1 (0.7)1 (0.7)1 (4.0)
  Ex-smoker3 (0.9)2 (1.4)1 (0.7)0 (0.0)
  Never smoked319 (98.1)142 (97.9)153 (98.7)24 (96.0)
Geographic region
 Northern Vietnam568 (58.1)321 (65.9)205 (50.6)42 (49.4)
 Southern Vietnam409 (41.9)166 (34.1)200 (49.4)43 (50.6)

Data are presented as median (interquartile range) or n (%). #: nine missing values; : 31 paediatric patients <15 years old not asked.