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Evaluating COVID-19 Information and Risk-Averse Behaviours: Insights from Conjoint and Clustering Analyses in the UK, Japan, and Taiwan Cover

Evaluating COVID-19 Information and Risk-Averse Behaviours: Insights from Conjoint and Clustering Analyses in the UK, Japan, and Taiwan

Open Access
|Aug 2025

Figures & Tables

Table 1

Three regions’ demographic distributions.

VARIABLESUKJPTW
GenderMen45.2%50.3%48.4%
Women54.8%49.7%51.6%
Age20–2918.2%15.4%19.5%
30–3920.1%19.8%20.7%
40–4922.2%27.0%24.1%
50–5927.0%25.5%25.0%
60–6412.5%12.4%10.7%
EducationCollege graduate and above40.3%51.5%68.5%
Other59.7%48.5%31.5%
Household incomeHigher34.0%31.0%32.1%
Middle25.3%29.3%31.2%
Lower33.8%26.6%32.7%
Cannot answer6.9%13.1%4.0%

[i] UK: n = 1,894; JP: n = 2,179; TW: n = 1,993.

Note: UK = United Kingdom; JP = Japan; TW = Taiwan.

Table 2

Factors (Attributes) and Levels.

FACTORS (ATTRIBUTES)LEVEL 1LEVEL 2LEVEL 3
Number of daily new COVID-19 infections across the countryJP: Less than 2,000/UK: Less than 5,000/TW: Less than 20JP: Around 10,000/UK: Around 25,000/TW: Around 100JP: 50,000 or over/UK: 100,000 or over/TW: 400 or over
Holding of large-scale eventsNo restrictions on audience numbersAble to be held with restrictions on audience numbersOnly able to be held without an audience
State of hospital beds in your local council areaAbundance of hospital bedsApproximately 50% occupation of hospital bedsBeds are stretched, and you cannot be admitted to hospital immediately
Someone infected near youNobody has been infected near youSomeone at work has been infectedSomeone at home has been infected
Economic consequences near youNobody has lost their job near you because of COVID-19Friend has lost their job because of COVID-19Family member has lost their job because of COVID-19
Living with familyLiving aloneLiving with someone (who is neither an older adult nor at high risk)Living with someone (who is either an older adult or at high risk)
EmploymentAble to work from homeRequired to commute to an officeWork that has a lot of contact with people, such as medicine, care, and hospitality
COVID-19 vaccineUnvaccinatedVaccinated

[i] Note: JP = Japan, UK = United Kingdom, TW = Taiwan. Each level of the factor of Number of daily new COVID-19 infections across the country in the three regions was set differently according to differences in the respective situation at the time. The common criteria were set as follows. Level 1 = Approximate number of daily new infections across the country at the first peak of the COVID-19 pandemic (spring 2020) in the region; Level 2 = Approximately five times that of Level 1; Level 3 = Approximately half of the largest number of infections per day experienced to the date of the survey administered in the region and approximately four to five times that of Level 2.

dsj-24-1798-g1.png
Figure 1

Importance (utility range) of factors of COVID-19 information.

Notes:

The factors are: Number of daily new COVID-19 infections across the country, Holding of large-scale events, State of hospital beds in your local council area, Someone infected near you, Economic consequences near you, Living with family, Employment; and COVID-19 vaccine.

See also Table 2.

Table 3

UK influence degree of factors and independent variables of each class.

FACTORSLEVELSADJUSTED COEFFICIENTSUTILITY RANGE (IMPORTANCE)
CLASS 1CLASS 2CLASS 3CLASS 4CLASS 1CLASS 2CLASS 3CLASS 4
Provided InformationNumber of daily new COVID-19 infectionsUK Less than 5,000–0.10–0.13–0.17–0.060.210.250.360.12
UK Around 25,000–0.010.01–0.010.01
UK 100,000 or over0.110.120.190.06
Large-scale eventsNo restrictions on audience–0.02–0.02–0.040.000.050.050.080.01
Restrictions on audience numbers0.000.00–0.010.00
Without an audience0.030.030.040.01
State of hospital bedsPlenty of hospital beds–0.09–0.10–0.13–0.050.180.180.280.10
50% of hospital beds–0.010.02–0.030.01
Cannot be admitted to hospital immediately0.100.080.150.04
Someone infected
near you
Nobody infected–0.11–0.17–0.17–0.060.230.320.330.14
Someone at work infected0.000.020.02–0.02
Someone at home infected0.110.150.150.08
Economic consequences near you because of COVID-19Nobody has lost their job–0.03–0.02–0.060.000.060.030.100.00
Friend has lost their job0.000.000.020.00
Family member has lost their job0.030.010.040.00
Living with familyLiving alone–0.08–0.09–0.12–0.050.180.250.300.12
Living with someone (not elderly or high risk)–0.03–0.08–0.06–0.02
Living with elderly or high risk0.100.160.180.07
EmploymentAble to work from home–0.04–0.08–0.11–0.030.100.190.230.06
Required to commute–0.01–0.03–0.010.00
Work lots of contact with people0.050.110.120.03
COVID-19 vaccineUnvaccinated0.070.110.090.030.140.210.190.06
Vaccinated–0.07–0.11–0.09–0.03
CovariatesGenderMen0.09–0.10–0.120.12
Women–0.090.100.12–0.12
Age20–290.28–0.05–0.09–0.13
30–390.240.230.04–0.51
40–490.240.230.04–0.51
50–59–0.09–0.09–0.030.22
60–64–0.09–0.09–0.030.22
Educational levelLower0.000.010.04–0.05
Higher (College graduates or higher)0.00–0.01–0.040.05
Household IncomeLow–0.080.22–0.210.07
Mid0.17–0.020.05–0.20
High–0.09–0.200.160.14
Vaccine statusOthers0.160.120.07–0.36
Vaccine hesitancy–0.16–0.12–0.070.36
Health numeracy0.000.030.01–0.03
Science literacy0.000.050.01–0.06
Cautious habitual behaviors–0.070.180.11–0.23
Risk taking habitual behaviors0.02–0.10–0.010.09
Trust in government measures against COVID-190.02–0.040.010.01
Trust in medical institutions’ measures against COVID-19–0.040.140.00–0.11
Constant1.32–3.22–1.203.10
R20.140.100.120.10
N (Total 1,505)512465383145
Table 4

UK compositions of the subgroups (four classes).

CLASS 1CLASS 2CLASS 3CLASS 4
Class sizes34.08%30.82%25.34%9.76%
Average values of evaluation on 18 conjoint cards5.948.957.903.56
Age20–2925.71%13.22%17.41%24.12%
30–3923.67%19.36%20.13%13.63%
40–4920.47%22.22%23.39%26.37%
50–5920.94%31.13%26.99%24.03%
60–649.21%14.08%12.07%11.85%
GenderMen51.06%43.65%41.88%49.62%
Women48.94%56.35%58.12%50.38%
Household IncomeLow31.21%40.56%26.93%40.91%
Mid31.56%27.30%28.07%20.03%
High37.23%32.14%45.01%39.06%
Educational levelLower57.56%59.05%57.82%62.18%
Higher (College graduates or higher)42.44%40.95%42.18%37.82%
Vaccine statusOthers93.36%96.82%94.97%75.47%
Vaccine hesitency6.64%3.18%5.03%24.53%
Health numeracy (Average valuie)5.005.425.044.66
Science literacy (Average value)6.697.286.866.34
Trust in government measures against COVID-19(Average value)13.2112.8813.4411.75
Trust in medical institutions’ measures againt COVID-19 (Average value)15.5817.3916.2713.30
Cautious habitual behaviors (Average value)10.4812.0411.648.87
Risktaking habitual behaviors (Average value)9.477.508.899.79
N = 1,505
Table 5

Summary of UK subgroup (class) characteristics.

SUBGROUPPOSSIBLE INTERPRETATIONSRISK-AVERSE BEHAVIOUR FREQUENCY (AVERAGE VALUES OF DEPENDENT VARIABLES)RESPONDENT’S CHARACTERISTICSCHARACTERISTICS OF THE UTILITY RANGE OF CONJOINT EXPERIMENT
Class 1ModerateModerateYonger ageModerate utility ranges in all the factors
Class 2PrudentHighHigher age, higher educational level, higher health numeracy, higher science literacy, higher trust in medical institutions, cautious habitual behaviorsModerate utility ranges in all the factors
Class 3Government SupporterModerateWomen, higher income, higher trust in government measuresRelatively higher utility rages in all the factors
Class 4Risk-takingLowYounger age, men, vaccine hesitancy, lower trust in government measures, lower health numeracy, lower science literacy, lower trust in medical institutions, risk-taking havitual behavioursLower utility ranges in all the factors
Table 6

Japan influence degree of factors and independent variables of each class.

FACTORSLEVELSADJUSTED COEFFICIENTSUTILITY RANGE (IMPORTANCE)
CLASS 1CLASS 2CLASS 3CLASS 4CLASS 1CLASS 2CLASS 3CLASS 4
Provided InformationNumber of daily new COVID-19 infectionsJP Less than 2,000–0.25–0.25–0.30–0.110.450.500.580.21
JP Around 10,0000.050.010.020.01
JP 50,000 or over0.200.240.280.10
Large-scale eventsNo restrictions on audience0.00–0.020.010.000.100.030.020.01
Restrictions on audience numbers–0.050.00–0.010.00
Without an audience0.050.01–0.010.01
State of hospital bedsPlenty of hospital beds–0.14–0.13–0.17–0.040.300.300.410.09
50% of hospital beds–0.02–0.04–0.07–0.01
Cannot be admitted to hospital immediately0.160.170.240.05
Someone infected near youNobody infected–0.12–0.08–0.13–0.020.180.150.260.04
Someone at work infected0.060.010.000.00
Someone at home infected0.060.070.130.02
Economic consequences near you because of COVID-19Nobody has lost their job–0.03–0.05–0.11–0.020.060.100.200.04
Friend has lost their job0.010.000.030.00
Family member has lost their job0.030.050.080.02
Living with familyLiving alone–0.09–0.08–0.12–0.030.250.210.320.07
Living with someone (not elderly or high risk)–0.07–0.05–0.08–0.01
Living with elderly or high risk0.160.130.200.04
Employ-mentAble to work from home–0.12–0.07–0.15–0.010.300.160.370.05
Required to commute–0.06–0.03–0.08–0.02
Work lots of contact with people0.180.090.220.03
COVID-19 vaccineUnvaccinated0.140.080.170.030.280.150.330.06
Vaccinated–0.14–0.08–0.17–0.03
CovariatesGenderMen–0.260.19–0.180.24
Women0.26–0.190.18–0.24
Age20–29–0.140.03–0.010.12
30–390.010.13–0.03–0.12
40–490.010.13–0.03–0.12
50–59–0.01–0.04–0.040.09
60–64–0.01–0.04–0.040.09
Educational levelLower0.05–0.090.020.02
Higher (College graduates or higher)–0.050.09–0.02–0.02
Household IncomeLow0.07–0.11–0.110.15
Mid–0.090.120.06–0.09
High0.020.000.05–0.06
Vaccine statusOthers0.150.020.08–0.25
Vaccine hesitancy–0.15–0.02–0.080.25
Health numeracy0.010.010.03–0.05
Science literacy0.04–0.050.000.02
Cautious habitual behaviors0.30–0.080.03–0.24
Risk taking habitual behaviors–0.160.05–0.050.16
Trust in government measures against COVID-19–0.040.02–0.010.04
Trust in medical institutions’ measures against COVID-190.10–0.010.08–0.17
Constant–3.911.33–0.973.55
R20.120.180.180.06
N (Total 1,571)476470439186
Table 7

Japan compositions of the subgroups (four classes).

CLASS 1CLASS 2CLASS 3CLASS 4
Class sizes30.52%30.08%27.61%11.79%
Average values of evaluation on 18 conjoint cards9.276.598.274.18
Age20–2911.17%17.65%14.96%21.70%
30–3918.39%24.30%19.02%21.32%
40–4928.13%26.08%27.45%28.52%
50–5928.66%22.00%25.47%17.36%
60–6413.66%9.97%13.10%11.10%
GenderMen43.15%66.43%48.46%67.49%
Women56.85%33.57%51.54%32.51%
Household incomeLow32.04%24.81%26.68%36.94%
Mid31.18%38.75%36.20%30.97%
High36.78%36.45%37.11%32.09%
Educational levelLower49.97%38.51%46.68%46.40%
Higher (College graduates or higher)50.03%61.49%53.32%53.60%
Vaccine statusOthers93.49%90.27%92.25%77.73%
Vaccine hesitency6.51%9.73%7.75%22.27%
Health numeracy (Average valuie)6.686.616.736.18
Science literacy (Average value)6.606.216.456.14
Trust in government measures against COVID-19(Average value)11.9011.8112.2210.18
Trust in medical institutions’ measures againt COVID-19 (Average value)14.8313.6814.7311.25
Cautious habitual behaviors (Average value)13.5012.5612.9811.77
Risktaking habitual behaviors (Average value)5.556.896.097.91
N = 1,571
Table 8

Summary of Japan subgroup (class) characteristics.

SUBGROUPPOSSIBLE INTERPRETATIONSRISK-AVERSE BEHAVIOUR FREQUENCY (AVERAGE VALUES OF DEPENDENT VARIABLES)RESPONDENT’S CHARACTERISTICSCHARACTERISTICS OF THE UTILITY RANGE OF CONJOINT EXPERIMENT
Class 1PrudentHighHiger age, women, higher science literacy, higher trust in government measures, higher trust in medical institutions measures, cautious habitual behavioursModerate utility ranges in all the factors
Class 2SimpleModerateMen, higher educational levelGenerally have lower utility ranges but has a simple, higher utility ranges in the factor of numbers as well as hospital beds
Class 3Government SupporterModerateWomen, higher household income, hgiher health numeracy, higher trust in govenmental measuresHigher utility ranges in all the factors, especially in Numbers, Beds, and Vaccine
Class 4Risk-takingLowYonger age, men, lower household income, vaccine hesitency, lower health numeracy, lower science literacy, lower trust in government measures, lower trust in medical institutions measures, risk-taking habitual behaviorsLower utility ranges in all the factors
Table 9

Taiwan influence degree of factors and independent variables of each class.

FACTORSLEVELSADJUSTED COEFFICIENTSUTILITY RANGE (IMPORTANCE)
CLASS 1CLASS 2CLASS 3CLASS 4CLASS 1CLASS 2CLASS 3CLASS 4
Provided InformationNumber of daily new COVID-19 infectionsTW Less than 20–0.43–0.39–0.31–0.140.830.800.650.26
TW Around 1000.03–0.02–0.020.01
TW 400 or over0.400.410.340.13
Large-scale eventsNo restrictions on audience0.020.010.000.000.060.060.010.00
Restrictions on audience numbers–0.04–0.040.000.00
Without an audience0.020.030.010.00
State of hospital bedsPlenty of hospital beds–0.09–0.08–0.06–0.020.150.210.160.04
50% of hospital beds0.02–0.04–0.03–0.01
Cannot be admitted to hospital immediately0.070.120.090.03
Someone infected near youNobody infected–0.20–0.13–0.11–0.030.320.230.190.06
Someone at work infected0.090.030.030.00
Someone at home infected0.110.100.080.03
Economic consequences near you because of COVID-19Nobody has lost their job–0.03–0.05–0.03–0.010.070.080.060.02
Friend has lost their job–0.020.030.010.01
Family member has lost their job0.050.020.020.00
Living with familyLiving alone–0.08–0.06–0.04–0.010.120.110.070.02
Living with someone (not elderly or high risk)0.040.010.01–0.01
Living with elderly or high risk0.040.050.030.01
Employ-mentAble to work from home–0.14–0.09–0.05–0.020.260.190.110.04
Required to commute0.01–0.01–0.02–0.01
Work lots of contact with people0.130.100.070.02
COVID-19 vaccineUnvaccinated0.100.120.070.050.200.250.150.09
Vaccinated–0.10–0.12–0.07–0.05
CovariatesGenderMen–0.16–0.200.050.30
Women0.160.20–0.05–0.30
Age20–290.01–0.09–0.100.18
30–390.090.04–0.09–0.05
40–490.090.04–0.09–0.05
50–59–0.070.230.05–0.20
60–64–0.070.230.05–0.20
Educational levelLower0.08–0.03–0.040.00
Higher (College graduates or higher)–0.080.030.040.00
Household IncomeLow0.12–0.05–0.03–0.04
Mid0.070.040.08–0.19
High–0.190.01–0.050.23
Vaccine statusOthers0.150.28–0.09–0.34
Vaccine hesitancy–0.15–0.280.090.34
Health numeracy0.010.01–0.020.00
Science literacy0.040.05–0.05–0.03
Cautious habitual behaviors0.190.03–0.13–0.09
Risk taking habitual behaviors–0.080.000.040.04
Trust in government measures against COVID-190.010.020.01–0.03
Trust in medical institutions’ measures against COVID-190.03–0.01–0.040.02
Constant–2.28–0.692.170.80
R20.170.190.200.14
N (Total 1,574)563501333177
Table 10

Taiwan compositions of the subgroups (four classes).

CLASS 1CLASS 2CLASS 3CLASS 4
Class sizes35.59%31.95%21.04%11.42%
Average values of evaluation on 18 conjoint cards9.268.006.115.62
Age20–2918.76%18.84%20.01%25.54%
30–3922.62%22.70%20.58%21.12%
40–4922.30%30.02%24.10%19.64%
50–5926.84%19.11%26.32%20.78%
60–649.47%9.33%8.99%12.92%
GenderMen44.66%45.55%55.59%68.27%
Women55.34%54.45%44.41%31.73%
Household IncomeLow35.74%28.49%31.78%30.76%
Mid33.45%33.56%35.91%27.22%
High30.81%37.96%32.31%42.02%
Educational levelLower32.67%25.33%29.72%27.35%
Higher (College graduates or higher)67.33%74.67%70.28%72.65%
Vaccine statusOthers96.21%97.30%93.87%91.73%
Vaccine hesitency3.79%2.70%6.13%8.27%
Health numeracy (Average valuie)6.516.576.176.48
Science literacy (Average value)7.277.376.877.18
Trust in government measures against COVID-19 (Average value)14.8814.6414.0013.68
Trust in medical institutions’ measures againt COVID-19 (Average value)16.6516.3015.6215.82
Cautious habitual behaviors (Average value)13.1712.8712.3812.51
Risktaking habitual behaviors (Average value)8.139.069.359.49
N = 1,574
Table 11

Summary of Taiwan subgroup (class) characteristics.

SUBGROUPPOSSIBLE INTERPRETATIONSRISK-AVERSE BEHAVIOUR FREQUENCY (AVERAGE VALUES OF DEPENDENT VARIABLES)RESPONDENT’S CHARACTERISTICSCHARACTERISTICS OF THE UTILITY RANGE OF CONJOINT EXPERIMENT
Class 1PrudentHighHigher age, women, higher trust in government measures, higher trust in medical institutions’ measures, cautious habitual behavioursHigher utility ranges but has a exclusive higher utility range in the factor of Numbers
Class 2SimpleModerate to highMoiddle age, women, higher education level, higher health numeracy, higher science literacyModerate to high utility ranges but has a exclusive higher utility range in the factor of Numbers
Class 3StrayModerateMen, lower health numeracy, lower science literacy, lower trust in government measures, lower trust in medical institutional measuresModerate utility ranges but has a simple, exclusive wider utility range in the factor of Numbers
Class 4Risk-takingLowYonger age, men, vaccine hesitency, lower trust in government measures, and risk-taking habitual behavioursLower utility ranges in all the factors
Language: English
Submitted on: Jul 30, 2024
Accepted on: Jun 5, 2025
Published on: Aug 13, 2025
Published by: Ubiquity Press
In partnership with: Paradigm Publishing Services
Publication frequency: 1 issue per year

© 2025 Naoko Kato-Nitta, Yusuke Inagaki, Tadahiko Maeda, published by Ubiquity Press
This work is licensed under the Creative Commons Attribution 4.0 License.