Table 3. Risk Factors of High Infection Intensity (Moderate and Heavy Infections) Based on Multivariate Logistic Regression.

Features	Total	Moderate or heavy intensity of infection (n, %)	cOR* (95%CI)	aOR** (95%CI)
Years of raw fish consumption
0–5	118	34(28.8)	Ref	Ref
6–10	89	28(31.5)	1.13(0.62–2.06)	0.95(0.50–1.76)
>10	302	133(44.0)	1.94(1.24–3.10)	1.21(0.71–2.07)
Frequency of raw fish consumption
0–11 times per year	378	124(32.8)	Ref	Ref
12–50 times per year	107	55(51.4)	2.17(1.40–3.36)	1.74(1.09–2.80) #
>50 times per year	24	16(66.7)	4.10(1.75–10.35)	2.89(1.20–7.50) #
Quantity of raw fish consumption
0–9	95	25(26.3)	Ref	Ref
10–19	123	36(29.3)	1.16(0.64–2.13)	1.01(0.55–1.89)
≥20	291	134(46.0)	2.39(1.45–4.05)	1.66(0.94–2.99)
Location of raw fish consumption
Restaurant and others	77	34(44.2)	Ref	Ref
Home	432	161(37.3)	0.75(0.46–1.23)	0.78(0.47–1.31)
Use of anti-parasitic after eating raw fish
No	494	188(38.1)	Ref	Ref
Occasionally	15	7(46.7)	1.42(0.49–4.03)	1.24(0.41–3.67)
Previous diagnosis with clonorchiasis before
Yes	57	23(40.4)	Ref	Ref
No	481	172(35.8)	0.91(0.52–1.61)	1.15(0.63–2.15)
Knowledge of the infection route of clonorchiasis
Yes	308	127(41.2)	Ref	Ref
No	230	71(30.9)	0.72(0.49–1.03)	0.75(0.50–1.12)
Knowledge of the potential to cause cancer
Yes	57	23(40.4)	Ref	Ref
No	481	175(36.4)	0.92(0.52–1.65)	1.07(0.58–2.00)

* cOR: crude odds ratio

** aOR: adjusted odds ratio

# Statistical differences identified.