Table 2.

Crude and adjusted Odds Ratio (OR) with 95% Confidence Intervals (CI) of the effect of current asthma and other variables on reporting that the child is affected by exposure to bakhour using logistic regression analysis.

	Number (%) of total sample	(%) affected by bakhour	Crude OR (95% CI)	Adjusted OR# (95% CI)
Current asthma
▪ No	2065 (84.6)	43.6	1.00	1.00
▪ Yes	376 (15.4)	56.4	2.32 (1.84–2.93)*	2.55 (1.97–3.31)*
Bakhour use per week
▪ Never or rarely	463 (19.0)	19.7	1.00	1.00
▪ 1–2 times/week	549 (22.5)	22.8	1.21 (0.89–1.63)	2.28 (1.63–3.21)*
▪ >2 times/week	1423 (58.4)	26.6	1.48 (1.14–1.91)*	3.01 (2.23–4.06)*
Bakhour use in presence of child
▪ No	1032 (42.3)	35.1	1.00	1.00
▪ Yes	1409 (57.7)	16.5	0.37 (0.30–0.44)*	0.51 (0.40–0.65)*
Bakhour use in the child room
▪ No	1030 (42.2)	36.4	1.00	1.00
▪ Yes	1411 (57.8)	15.5	0.32 (0.27–0.38)*	0.36 (0.28–0.46)*
Gender
▪ Male	1290 (52.8)	21.9	1.00	1.00
▪ Female	1151 (47.2)	24.3	1.33 (1.04–1.60)*	1.31 (1.07–1.61)*
Region
▪ Muscat	1241 (50.8)	19.3	1.00	1.00
▪ Sharqiyah	1200 (49.2)	29.5	1.75 (1.45–2.10)*	1.31 (1.07–1.62)*
Father education
▪ No School education	973 (41.1)	30.2	1.00	1.00
▪ Didn't complete High School	905 (38.2)	22.8	0.68 (0.55–0.83)*	0.79 (0.62–1.00)
▪ Completed High School	492 (20.8)	15.4	0.42 (0.32–0.55)*	0.65 (0.45-.92)*
Mother education
▪ No School education	1328 (55.3)	27.7	1.00	1.00
▪ Didn't complete High School	829 (34.5)	21.6	0.72 (0.59–0.88)*	0.86 (0.67–1.10)
▪ Completed High School	244 (10.2)	13.9	0.42 (0.29–0.61)*	0.68 (0.43–1.07)*
Any parent smoking
▪ No	1860 (76.2)	24.4	1.00	1.00
▪ Yes	581 (23.8)	24.3	1.00 (0.80–1.23)	1.02 (0.80–1.31)

*Statistically significant at p-value < 0.05

# adjusted for all variables listed in the table.