Table. Number and Percentage of Nonvalidated Upper Arm and Wrist Cuffs Among the 100 Best-Selling Blood Pressure Device Lists From 10 Country-Specific Amazon Websites.
| Country | Median (IQR) | |||||
|---|---|---|---|---|---|---|
| Upper arm cuff devicesa | Wrist cuff devicesa | |||||
| Total No.b | Nonvalidated devices, No.c | Nonvalidated devices, %d | Total No.b | Nonvalidated devices, No.c | Nonvalidated devices, %d | |
| Australia | 44 (42-49) | 42 (40-46) | 95 (94-96) | 23 (22-23) | 20 (19-21) | 87 (86-88) |
| Canada | 54 (53-56) | 38 (34-41) | 70 (64-74) | 15 (14-16) | 12 (11-13) | 81 (80-83) |
| France | 50 (48-54) | 38 (37-40) | 76 (76-77) | 23 (23-27) | 22 (20-23) | 88 (85-92) |
| Germany | 63 (61-64) | 39 (39-43) | 65 (62-67) | 21 (20-22) | 15 (14-16) | 73 (68-79) |
| India | 56 (55-59) | 55 (53-57) | 97 (96-97) | 5 (4-6) | 4 (2-5) | 69 (67-76) |
| Italy | 58 (55-60) | 42 (40-44) | 74 (73-75) | 16 (15-17) | 12 (11-13) | 77 (70-85) |
| Mexico | 39 (36-42) | 33 (30-35) | 84 (82-84) | 30 (29-32) | 28 (26-31) | 93 (92-96) |
| Spain | 50 (50-51) | 39 (37-40) | 75 (71-80) | 22 (18-23) | 18 (17-21) | 91 (88-95) |
| United Kingdom | 66 (62-68) | 52 (50-53) | 78 (76-80) | 14 (14-17) | 13 (11-15) | 85 (79-91) |
| United States | 63 (60-65) | 51 (50-55) | 84 (83-85) | 32 (28-33) | 32 (28-33) | 100 (100-100) |
| Total | 55 (49-61) | 41 (38-49) | 79 (73-85) | 21 (15-25) | 2 (1-3) | 84 (78-94) |
a
The total number of upper arm and wrist cuff devices does not sum to 100 because there were items meeting prespecified exclusion criteria (eg, manual sphygmomanometers, cuffs, stethoscopes) that were not analyzed.
b
Data are the median (IQR) total number of devices recorded at each of the 7 discrete data capture dates across the 1-year period between February 2020 and January 2021.
c
Data are the median (IQR) number of nonvalidated devices identified from the 7 discrete data capture dates across the 1-year period.
d
The median (IQR) of the percentage of nonvalidated devices recorded at each of the 7 discrete data capture dates across the 1-year period.