. 2021 Jul 26;21(11):869–879. doi: 10.1007/s12012-021-09677-8

Table 2.

ETS exposure based on SHSES in the studied group

SHSES score^a		3.13 ± 3.67
ETS exposure based on SHSES
No^b		51/47.7
Low^b		14/13.1
Medium^b		22/20.6
High^b		20/18.7
Exposure at home per day
> 20 cigarettes per day^b		4/3.8
10–20 cigarettes per day^b		16/14.9
6–9 cigarettes per day^b		18/16.8
1–5 cigarettes per day^b		6/5.6
None^b		63/58.9
Exposure in a car per day
30 min or more^b		10/9.3
Less than 30 min^b		27/25.2
Never^b		70/65.4
Exposure in public places the past week
Once or more^b		48/44.8
Never^b		59/55.1
Exposure at work the past week
Once or more^b		28/26.2
Never^b		79/73.8

^aArithmetic mean ± standard deviation

^bNumber/percentages