Population: Bangladeshi adults were considered as a population in this cross-sectional study. A total number of 320 samples were selected from the population. This study was a part of our project “survey on psychological stress, practice and perception toward COVID-19 among Bangladeshi adults during the COVID-19 pandemic”. Data was collected from 10 to 20 April, 2020 through online survey. Both sexes and most of the professions were considered, and participants were living in different locations in Bangladesh. The general characteristics and the project related information were collected from each of the subjects.
Sample size determination: The following formula was used to calculate our sample size n = z2 p(1-p)/d2, where n is the number of samples, z is the value from the standard normal distribution for the selected confidence level (we considered z=1.96 for 95% confidence level), p = the proportion of prevalence =0.269 (26.9% was the perception for getting COVID-19), 1-p=0.731, and d= the margin of error=0.05 (considered). This information was taken from a published paper [14]. The mathematical formula delivered that 297 samples would be sufficient for our present study. However, we considered 320 samples for this study.
Questionnaire: All information were collected using a self-developed questionnaire, which was designed according to Survey Tool and Guidance (Rapid, simple, flexible behavioral insights on COVID-19) of WHO [15]. We prepared a draft questionnaire and sent it to three infectious disease specialists for their opinions on its simplicity and full content. We followed experts’ suggestions, and finalized the questionnaire. The questionnaire was translated to Bangla (mother tongue of Bangladesh) to make it easily understandable for the participants. After translating, the questionnaire was carefully checked by our two authors for correctly fitting it to COVID-19 issues. We could not conduct pilot survey due to shortage of budget and time. However, the Cronbach Alpha value (0.792) showed that the internal consistency (reliability) of our questionnaire was more than the acceptance level (good).
Data collection procedure: Soft copies of the questionnaire were sent to the participants using online tools like e-mail, messenger, and WhatsApp in the personal computers, laptops, and cell phones. Four authors of the present study collected information, and the repetition of the responses was strictly checked. The questionnaire was sent to more than 400 Bangladeshi adults, out of whom 320 sent back filled up questionnaire with their written consent. The filled up questionnaires were checked by the present authors, and all questionnaires were valid.
Inclusion criteria: For the prevailing locked down situation, we could not follow any criteria for the participants. However, the participants were known to the four authors and their colleagues, friends and relatives. We became sure that they were not suffering from any mental problems during the time of interview.
Measurement of practice to avoid and perception toward COVID-19: The practice of following WHO’s guidelines to avoid COVID-19 was measured using a general question based on WHO-recommended guidelines [1]. We asked the participants, “Are you following COVID-19 prevention guidelines suggested by WHO?” The prevention guidelines were; (i) wash hands with soap frequently, (ii) wearing mask, (iii) maintain social distancing (>1 meter), (iv) avoid group gathering, (v) cover mouth and nose with a tissue or handkerchief when coughing or sneezing, and (vi) avoid touching the eyes, nose and mouth without washing hands with soap. Five measurement scales were used to understand the level of practice: (i) never, (ii) occasionally, (iii) sometimes, (iv) often, and (v) always. For further statistical analysis, samples were classified into two classes: (i) the participants answering “always” were considered as good practice (code, 1), and (ii) the participants answering other categorical scales (never to often), indicated as poor practice (code, 0).
The risk of perception was measured by four types of perceptions toward COVID-19 such as (i) seriousness of the disease; question: how serious do you think COVID-19 is?, (ii) susceptibility to the disease; question: what do you think about your chance of getting COVID-19?, (iii) efficacy and self-efficacy; question: do you think that you will manage to carry out prevention measures currently recommended by the authority?, (iii) intention to carry out the measures; question: are you willing to carry out prevention measures currently recommended by the authority? Four categorical scales were used to determine the level of risk of perception such as for perception (i) (a) very serious, (b) serious, (c) slightly serious and (d) not serious; for perception (ii) (a) very much chance, (b) much chance, (c) slightly chance and (d) no chance; for perception type (iii) and (iv) (a) most certainly, (b) probably yes, (c) probably not and (d) certainly not. Then (a) and (b) were considered as risk perception (code, 1), and (c) and (d) were indicated as (ii) no risk perception (code, 0) for each type of perception. The total perception score ranged from 0 (no risk) to 4 (high risk). We added all scores of four types of perception ((i) to (iv)) for calculating the actual level of total scores for measuring high risk of perception. A cut off level of score ≤3 (code, 0) was evaluated as low risk, and of score 4 (code, 1) was indicated as high risk.
Outcome variable: There were two outcome variables for this study: (i) nature of practice: (a) good practice (code, 1), and (b) poor practice (code, 0); (ii) risk of perception: (a) high risk perception (code, 1), and (b) low risk perception (code, 0).
Independent variables: Some socio-economic and demographic factors were considered as independent variables for finding association with good practice to avoid and high risk of perception toward COVID-19 among Bangladeshi adults. Most of the socioeconomic and demographic factors were selected on the basis of a related study [16]. These variables, their categories, codes, and definition are mentioned in Table 1.
Table 1: Variables and their categories with codes and definition
Variable
|
Group
|
Definition
|
Code
|
Variable
|
Group
|
Definition
|
Code
|
Gender
|
Male
|
|
1
|
Residence
|
Urban
|
|
1
|
|
Female
|
|
2
|
|
Rural
|
|
2
|
Marital status
|
Currently married
|
|
1
|
Age group (year)
|
<40
|
Young adult
|
1
|
|
Unmarried
|
|
2
|
|
≥40
|
Adult
|
2
|
Education level
|
Uneducated or primary
|
|
1
|
Occupation
|
Service holder
|
|
1
|
|
Secondary
|
|
2
|
|
Student
|
|
2
|
|
Higher
|
|
3
|
|
Housewife
|
|
3
|
|
|
|
|
|
Others
|
|
4
|
Family member
|
≤4
|
Small family
|
1
|
Family monthly income (Taka)
|
≤15000
|
Poor
|
1
|
|
≥5
|
Large family
|
2
|
|
15001-30000
|
Lower middle
|
2
|
Type of family
|
Nuclear
|
|
1
|
|
30001-45000
|
Upper middle
|
3
|
|
Joint
|
|
2
|
|
>45000
|
Rich
|
4
|
Statistical analysis: Frequency distribution was used to determine the frequency with percentage of samples corresponding to each question and level. Chi-square (χ2) test was utilized to find the association between (i) nature of practice and independent variables; (ii) risk of perception and independent variables. Binary logistic regression model was applied to examine the effect of socio-economic and demographic factors on (i) nature of practice and (ii) risk of perception. Only significantly (p<0.05) associated factors provided by χ2-test were used in logistic model as independent variables.
The underlying binary logistic regression model corresponding to variable is:
y= log [p/ (1 − p)] = β0 + βixj +eij (1)
where, p = the probability of good practice (coded 1), or high risk of perception (coded 1), 1 − p = the probability of poor practice (coded 0), or low risk of perception (coded 0), β0 = intercept term, βi = unknown logistic regression coefficients, and xj = independent variable, and eij= the error term. The parameter βi refers to the effect of xj on the log odds such that y = 1.
Statistical analyses were carried out using SPSS (IBM Version 22.0). Statistical significance was accepted at p < 0.05.