The protective behaviors assessed were five of the community mitigation practices recommended by CDC and WHO: hand hygiene, wearing a face mask, cough etiquette, social distancing,

and contact avoidance.7–9 Protective behaviors during Hajj were analyzed both as categorical BYL719 solubility dmso variables (whether the respondent reported engaging in the behavior) and as continuous variables (the number of behaviors reported by the respondent). Data were recorded by interviewers and then entered in an Excel spreadsheet. Pearson correlation coefficients, ANOVAs, and chi-square tests were used to assess variables and determine associations and correlations. Univariate factors with p values <0.2 were entered into multivariable regression analyses. E7080 Two-tailed p values <0.05 were considered statistically significant in multivariable models. To analyze the effects of protective behaviors during Hajj on respiratory illness, additional factors that have been shown to influence compliance with relevant health behaviors were also included in multivariable models.10

The variables included in multivariable models were (1) demographic and health factors: age, gender, education, whether respondent was US-born, health risk factors, seasonal influenza vaccination in the previous 12 months, influenza A(H1N1) vaccination prior to Hajj, and taking medication for respiratory illness during or post-Hajj; (2) travel-related factors: length of trip, international travel in the previous 12 months, and whether respondent had made a previous Hajj; and (3) influenza A(H1N1) knowledge and attitudes: if respondent received pre-travel health information, level of influenza A(H1N1) knowledge, perceived severity of influenza A(H1N1), and noticing influenza A(H1N1)-related health messages during the Hajj. Influenza A(H1N1) knowledge was calculated as the number of correct influenza A(H1N1) symptoms,

modes of transmission, and methods of prevention that the respondent provided when asked. Perceived severity of influenza A(H1N1) was calculated by asking respondents how serious a disease they felt influenza A(H1N1) was on a Likert scale from “not serious” (defined as “like a cold”) to “very serious” (defined as “it can kill you”). Pre-travel surveys were completed by 221 participants; 186 (84.2%) completed the post-Hajj survey DOCK10 after their return (Table 1). Reasons for not completing post-Hajj surveys included travelers not receiving a visa for Hajj (which forced trip cancellation), travelers receiving a visa but choosing not to go to Hajj, travelers making extended visits to other countries lasting past the time-frame for the survey, and being lost to follow-up. Analyses were conducted among the 186 participants who completed both pre- and post-travel surveys. The mean length of stay at Hajj was 24.1 days. Protective behaviors during the Hajj were reported by 144 (77.4%) of the 186 respondents.