The time-based change trend of positive results among blood donors in Basra/ Iraq, in the period 2019–2021
| Tests | Donors with positive results | Change (%)* | ||
| 2019 n=70 351 no (%) | 2020 n=57 860 no (%) | 2021 n=69 651 no (%) | ||
| HBV | 1086 (1.54) | 838 (1.45) | 796 (1.14) | −26 X2=54.179 p<0.01 |
| HBC | 97 (0.14) | 70 (0.12) | 77 (0.11) | −21.4 X2=4.828 p=0.089 |
| Syphilis | 269 (0.38) | 272 (0.47) | 250 (0.36) | −5.3 X2=1.080 p=0.582 |
| Total positive results | 1452 (2.1) | 1180 (2.04) | 1123 (1.6) | −23.8 X2=49.394 p<0.01 |
Positive test rate (%)=(the number of each positive test/ the total of corresponding tested blood donors in the same year)×100%.
The % changes were calculated in the following way: (positive results in 2021−positive results in 2019)/positive results in 2019.
*The result is significant at p<0.05.
HPC, hepatitis C virus; HPV, hepatitis B virus.