Volume 11, Number 5—May 2005
Avian Influenza Risk Perception, Hong Kong
|Purchasing prevalence||No. females (%)*||No. males (%)*||Multiplier†||Purchases‡
|≤1/y||26 (4.4)||18 (4.5)||1||26||18|
|Few/y||132 (22.4)||99 (25.0)||4||528||396|
|»1/mo||95 (16.1)||61 (15.4)||12||1,40||732|
|Few/mo||112 (19.0)||60 (15.1)||24||2,688||1,440|
|≥1/wk||84 (14.3)||44 (11.1)||52||4,368||2,288|
|Few/wk||25 (4.2)||18 (4.5)||100||2,500||1,800|
|Subtotal§||474 (80.3)||300 (75.8)||11,250||6,674|
|Never#||116 (19.7)||96 (24.2)||0||0|
|Total**||590 (100.0)||396 (100.0)|
|Total average household annual purchase††||19.07||16.85|
|Sex-adjusted household purchase rate‡‡||18.69|
*Reported buying frequency by males and females.
†Standardized number of purchases per unit time.
‡Standardized number of live chickens purchased annually (product of the proportionate buying rate [purchasing prevalence x numbers of male and female respondents buying at that rate x multiplier]).
§Total annual number of live chicken purchases reported by male and female respondents (standardized).
¶Annual standardized purchase rate only among respondents reporting household purchase of live chickens (11,250/ 474 [female], 6,674/300 [male]).
#Proportion reporting their household never buys live chickens.
**Total households in sample.
††Total reported household annual purchases (b)/number of women (590) and men (396) buying live chickens (subtotal).
‡‡In households buying live chickens, 14% of male respondents and 65% of female respondents make purchases. We have therefore assumed that the remaining purchases noted by 86% of male respondents within buying households are made by women at the higher female rate. We assumed that of the remaining 35% of female respondent households, 14% of purchases would be by men (at the male rate) and the remainder by women. The resulting figure is the overall sex-proportionately adjusted buying rate and is used as the estimated average household buying rate.