Table 1. Demographic and clinical characteristics of cases of SFTS human-to-human transmission in China and South Korea, 1996–2019.
| Characteristics | Index cases (n = 27) | Secondary cases (n = 111) | χ2 | t | P |
|---|---|---|---|---|---|
| Demographic features | |||||
| Sex, male | 16(n = 27) | 65(n = 93) | 1.08 | N/A | 0.30 |
| Age, y | 65.35±8.14(n = 26) | 51.76±13.35(n = 82) | N/A | 4.90 | <0.01 |
| Age>65y | 12(n = 26) | 13(n = 82) | 10.18 | N/A | <0.01 |
| Farmer | 23(n = 24) | 54(n = 94) | 12.43 | N/A | <0.01 |
| Time from onset to treatment, d | 4.00±2.81(n = 26) | 3.31±1.92(n = 45) | N/A | 976.50* | 0.62 |
| Time from onset to admission, d | 5.57±3.02(n = 26) | 3.31±1.92(n = 45) | N/A | 3.87 | <0.01 |
| General symptoms | |||||
| Fever | 27(n = 27) | 96(n = 106) | 1.57 | N/A | 0.21 |
| Fatigue | 13(n = 18) | 43(n = 64) | 0.16 | N/A | 0.69 |
| Headache | 10(n = 17) | 37(n = 79) | 0.81 | N/A | 0.37 |
| Myalgia | 13(n = 18) | 61(n = 85) | 0.002 | N/A | 0.97 |
| Gastrointestinal symptoms | 23(n = 24) | 53(n = 93) | 12.65 | N/A | <0.01 |
| Respiratory symptoms | 17(n = 19) | 25(n = 62) | 14.07 | N/A | <0.01 |
| CNS manifestation | 18(n = 21) | 10(n = 70) | 38.69 | N/A | <0.01 |
| Hemorrhagic symptoms | 23(n = 24) | 17(n = 90) | 49.25 | N/A | <0.01 |
| MODS | 16(n = 19) | 6(n = 69) | 45.31 | N/A | <0.01 |
| Fatal outcome | 27(n = 27) | 10(n = 110) | 90.89 | N/A | <0.01 |
Note: CNS is central nervous system, MODS is multi organ dysfunction syndrome, and n is the total number of cases for which information is available
* is T value (Wilcoxon W Test), y is year, d is day.