Table 3. Association of demographic parameters with PD status (OR and 95% CIs^*).

	Odds Ratio	95% Confidence Interval	P value (LRT)
Sex			0.021
Males	Ref.	-
Females	0.74	0.58–0.96
Age-class			0.005
≤ 59 y.	Ref.	-
60–64 y.	1.28	0.86–1.92
65–69 y.	1.57	1.08–2.30
70–74 y.	1.92	1.33–2.79
≥ 75 y.	1.76	1.21–2.57
Education			0.376
Primary school (5 y.)	Ref.	-
Secondary school(6–8 y.)	0.75	0.51–1.10
High school(9–14 y.)	0.87	0.60–1.26
Academic qualification ≥15y.)	0.98	0.65–1.48
Residence			0.103
Urban	Ref.	-
Mixed	0.72	0.53–0.98
Rural	0.97	0.57–1.65
Family history of PD			<0.001
(all relatives)
No	Ref.	-
Yes	2.22	1.59–3.10
Family history of PD			0.124
(1st degree relatives)
No	Ref.
Yes	1.34	0.92–1.93

*ORs and 95% CIs computed from an unconditional logistic regression model and adjusted for sex, age, smoking habit, intake of vegetable, meat, and cold cuts.