Country-by-country average anxiety and proportion of patients very anxious (score 9 or 10) about their supply of hydroxychloroquine sulfate at the heat of the crisis (April 2020),soon after resolution (August–September 2020) and 18 months later (December 2021–February 2022)
| Country | Answers received (n) | Average anxiety (SD) | % of very anxious patients | ||||||
| April 2020 | August–September 2020 | December 2021–February 2022 | April 2020 | August–September 2020 | December 2021–February 2022 | April 2020 | August–September 2020 | December 2021–February 2022 | |
| Finland | 66 | 23 | 86 | 5.39 (2.71) | * | 2.41 (2.46) | 9.1 | * | 3.5 |
| Portugal | 66 | 2 | 46 | 4.03 (2.70) | * | 1.22 (2.13) | 3.0 | * | 0.0 |
| Belgium | 95 | 54 | 112 | 6.23 (3.13) | 3.83 (3.41) | 3.77 (3.35) | 26.3 | 16.7 | 12.5 |
| Denmark | 36 | 21 | 85 | 5.86 (2.66) | * | 4.09 (3.20) | 16.7 | * | 9.4 |
| France | 422 | 285 | 100 | 6.46 (2.67) | 3.93 (3.13) | 3.14 (3.14) | 23.7 | 8.8 | 8.0 |
| Germany | 254 | 10 | 102 | 7.50 (2.48) | * | 4.15 (3.62) | 40.9 | * | 13.7 |
| Italy | 249 | 495 | 226 | 6.14 (2.84) | 4.26 (3.04) | 3.24 (3.07) | 22.9 | 9.1 | 6.2 |
| Lithuania | 29 | 21 | 91 | 8.10 (2.73) | * | 3.53 (3.36) | 62.1 | * | 9.9 |
| Netherlands | 62 | 24 | 37 | 6.00 (2.82) | * | 4.24 (3.36) | 21.0 | * | 10.8 |
| Slovakia | 53 | 33 | 22 | 5.87 (2.91) | 3.48 (3.13) | 2.27 (2.18) | 20.8 | 12.1 | * |
| Spain | 205 | 186 | 359 | 6.06 (3.07) | 4.19 (3.13) | 3.66 (3.49) | 21.5 | 8.6 | 9.7 |
| Switzerland | 47 | 83 | 3 | 6.28 (2.55) | 3.89 (2.80) | * | 23.4 | 7.2 | * |
| UK | 343 | 287 | 567 | 6.84 (2.76) | 4.49 (3.40) | 3.66 (3.43) | 31.2 | 13.9 | 12.3 |
| Bulgaria | 181 | 126 | 219 | 9.71 (1.02) | 8.69 (2.18) | 8.29 (2.73) | 92.8 | 71.4 | 64.4 |
| Poland | 43 | 26 | 115 | 9.02 (1.87) | 6.31 (3.28) | 9.09 (1.72) | 76.7 | 30.8 | 73.9 |
*Averages and SDs only calculated where more than 25 answers were received.