Table 5.

Factors associated with anticipated preventive behaviors to protect others if 2 to 3 new human-to-human H5N1 cases were to be reported in Hong Kong

	Full compliance with any quarantine policies			Face mask use in public venues if having ILI symptoms			Declaration of ILI symptoms at border health checkpoints			Seeking of medical consultation immediately with the onset of a fever
	Row%	ORu	ORm	Row%	ORu	ORm	Row%	ORu	ORm	Row%	ORu	ORm
Background characteristics
Education level
≤ Matriculated	87.5	ns	---	90.6	1.00	1.00	86.3	ns	---	94.2	ns	---
≥ University	89.6			96.0	2.47*	2.99*	88.4			94.2
Marital status
Never married	83.5	1.00	1.00	91.0	ns	---	84.6	ns	---	94.1	ns	---
Ever married	91.1	2.02*	2.02*	93.3			88.6			94.3
Employment status
Not employed full-time	87.4	ns	---	88.9	1.00	ns	86.4	ns	---	92.0	1.00	ns
Employed full-time	88.8			94.7	2.24*		87.5			95.7	1.96~
Perceived modes of transmission of human-to-human H5N1:
Respiratory droplets
No/not certain	79.2	1.00	ns	87.5	1.00	ns	90.3	ns	---	95.8	ns	---
Yes	89.8	2.32*		93.3	1.98~		86.5			94.0
Bodily contact
No/not certain	86.9	ns	---	91.9	ns	---	89.2	ns	---	93.8	ns	---
Yes	89.7			93.0			84.8			94.7
Objects contaminated with the virus
No/not certain	88.8	ns	---	91.4	ns	---	86.3	ns	---	93.4	ns	---
Yes	87.9			93.1			87.6			94.8
Eating well-cooked poultry
No/not certain	88.4	ns	---	91.8	ns	---	86.0	ns	---	93.9	ns	---
Yes	88.0			94.4			90.4			95.2
No. of items with "yes" responses in the above 4 items
0 – 2	87.7	ns	---	90.4	1.00	ns	87.1	ns	---	93.4	ns	---
3 – 4	89.1			95.5	2.27*		87.1			95.5
Perceived impacts of human-to-human H5N1
Perceived chance to have a major human-to-human H5N1 outbreak in Hong Kong
Low/very low chance/not certain	86.6	ns	---	90.5	1.00	1.00	83.7	1.00	1.00	93.2	ns	---
High/very high chance	91.6			96.4	2.80*	2.71*	94.0	3.04**	3.09**	96.4
Worry about oneself/family members contracting the virusa
Unlikely/very unlikely/not certain	87.1	ns	---	89.7	1.00	ns	86.7	ns	---	92.7	ns	---
Likely/very likely	89.3			94.8	2.10*		87.4			95.6
No effective drugs currently available
Disagree/not certain	85.5	1.00	ns	91.6	ns	---	83.9	1.00	ns	92.8	ns	---
Agree	90.9	1.70~		93.3			90.2	1.75*		95.7
Perceived susceptibility to H5N1 infection
Oneself or one's family	87.2	ns	---	91.3	ns	---	85.3	1.00	ns	93.2	ns	---
Unlikely/very unlikely/not certain	91.1			95.6			91.9	1.94~		97.0
Likely/very likely
Older people
Unlikely/very unlikely/not certain	78.0	1.00	ns	90.0	ns	---	86.0	ns	---	90.0	ns	---
Likely/very likely	89.4	2.38*		92.7			87.2			94.7
Adults
Unlikely/very unlikely/not certain	87.0	ns	---	91.6	ns	---	86.6	ns	---	94.6	ns	---
Likely/very likely	89.7			93.4			87.6			93.8
Children
Unlikely/very unlikely/not certain	78.1	1.00	1.00	90.4	ns	---	86.3	ns	---	91.8	ns	---
Likely/very likely	90.0	2.53**	2.50**	92.8			87.2			94.7
Health care workers
Unlikely/very unlikely/not certain	83.8	ns	---	91.4	ns	---	86.7	ns	---	93.3	ns	---
Likely/very likely	89.4			92.7			87.2			94.5
Food sellers
Unlikely/very unlikely/not certain	87.8	ns	---	85.1	1.00	ns	82.4	ns	---	89.2	1.00	ns
Likely/very likely	88.3			93.7	2.60*		87.9			95.1	2.36*
Food dealers
Unlikely/very unlikely/not certain	88.4	ns	---	88.4	1.00	ns	84.3	ns	---	94.2	ns	---
Likely/very likely	88.2			94.6	2.29*		88.5			94.3
The general public
Unlikely/very unlikely/not certain	86.2	1.00	ns	91.6	ns	---	85.6	ns	---	94.3	ns	---
Likely/very likely	92.3	1.92*		94.1			89.9			94.1
No. of items with "likely/very likely" responses in the above 8 items
0 – 6	86.7	1.00	ns	91.2	1.00	ns	85.7	ns	---	93.9	ns	---
7 – 8	92.9	1.99~		96.0	2.32~		91.3			95.2
Efficacy of prevention measures
Quarantine of the infected people
Low/very low/not certain	74.1	1.00	ns	81.5	1.00	ns	81.5	ns	---	92.6	ns	---
High/very high	89.1	2.85*		93.1	3.05*		87.4			94.3
Face mask use in public venues
Low/very low/not certain	70.8	1.00	1.00	70.8	1.00	1.00	75.0	1.00	ns	87.5	1.00	ns
High/very high	90.1	3.75***	3.31**	94.7	7.40***	8.03***	88.4	2.53*		94.9	2.68*
Frequent handwashing
Low/very low/not certain	81.3	ns	---	84.4	1.00	---	78.1	ns	---	87.5	ns	---
High/very high	88.7			93.0	2.46~		87.7			94.7
Home disinfection
Low/very low/not certain	85.7	ns	---	87.8	ns	---	73.5	1.00	1.00	91.8	ns	---
High/very high	88.5			93.0			88.5	2.79**	2.87**	94.5
Mass extermination of poultry
Low/very low/not certain	84.5	ns	---	90.1	ns	---	88.7	ns	---	89.4	1.00	1.00
High/very high	89.8			93.4			86.4			96.1	2.93**	2.93**
No. of items with "high/very high chance" responses in the above 5 items
0 – 3	77.4	1.00	ns	80.6	1.00	ns	77.4	1.00	ns	88.7	1.00	ns
4 – 5	89.8	2.57**		94.1	3.83***		88.4	2.23*		95.0	2.42~

^a Would worry that it is likely/very likely for oneself or one's family members to contract H5N1 (if 2–3 new cases were to be reported in Hong Kong. Gender, age group, and perception that the impacts of human-to-human H5N1 would be worse than that of SARS in terms of fatality rate and efficacy of treatment were not associated with any of the 4 dependent variables and were hence not tabulated.

OR_U = Univariate odds ratio.

OR_m = Odds ratios obtained from multivariate stepwise logistic regression using univariately significant (including marginally significant) variables as candidate variables.

^~ 0.5 < p < 0.1; *p < 0.5; **p < 0.01; ***p < 0.001.

ns = not significant.

--- univariately non-significant and was not considered in the multivariate stepwise logistic regression analysis.