Variables

n (%)

Age (years) Mean (SD): 31.9 (10.2)

Less than 40 years

40 years and above

Sex

Male

Female

Education status

None

Primary

Secondary and tertiary

Matrimonial status

Single

Married

Divorced

Family size Mean (SD): 1.5 (2.4)

Less than two children

Two or more children

Transportation

Particular vehicle

Public transport

Others

BMI (Kg/m²) Mean (SD): 23.9 (4.8)

Less than 30

30 and above

Current smoking

Yes

No

Sales area

HLM

Medina

Petersen

Exposure to other types of pollution

Yes

No

Workplace

Shop

Street

Duration of the work in the place (years) Mean (SD): 5.1 (5.9)

Less than 5 years

5 years and above

Duration on job (years) Mean (SD): 8.9 (7.7)

Less than 9 years

9 years and above

Number of working days per week (days) Mean (SD): 6.6 (0.6)

Less than 6 days

6 days and above

Number of hours worked per day (hours) Mean (SD):11.6 (2.2)

Less than 12 hours

12 hours and above

157 (79)

43 (21)

120 (60)

80 (40)

116 (58)

36 (18)

48 (24)

80 (40)

111 (56)

7 (4)

121 (63)

72 (37)

7 (4)

118 (59)

75 (38)

137 (68)

63 (32)

7 (4)

193 (96)

66 (33)

68 (34)

66 (33)

141 (70)

59 (30)

109 (54)

91 (46)

138 (69)

62 (31)

160 (80)

40 (20)

75 (38)

125 (62)

97 (48)

103 (52)