Table 3 The Blinder–Oaxaca decompose of total testing rate difference between low-income and high-income countries
Factors | Difference in characteristics | Percentage (%) | Difference in coefficients | Percentage (%) | ||
|---|---|---|---|---|---|---|
Coefficients | 95%CI | Coefficients | 95%CI | |||
Severity of COVID-19 | ||||||
 Total incident rate | 271.22 | (224.35 to 318.09) | 9.95 | 169.66 | (129.96 to 209.36) | 6.22 |
 Total mortality rate | −76.77 | (−125.79 to −27.75) | −2.82 | −18.98 | (−41.13 to 3.17) | −0.70 |
Socioeconomic status | ||||||
 GDP per capita | 863.25 | (745.01 to 981.49) | 31.66 | 250.81 | (159.19 to 342.44) | 9.20 |
 Proportion of age > 70 | 828.09 | (669.10 to 987.09) | 30.37 | −95.10 | (−140.24 to −49.96) | −3.49 |
Health status | ||||||
 Cardiovascular diseases | −83.98 | (−230.00 to 62.04) | −3.08 | 46.58 | (14.66 to 78.50) | 1.71 |
 Chronic respiratory diseases | 25.96 | (14.05 to 37.88) | 0.95 | 0.38 | (−1.05 to 1.80) | 0.01 |
 Diabetes diseases | 44.96 | (36.50 to 53.42) | 1.65 | −1.36 | (−2.63 to −0.09) | −0.05 |
 Neoplasms | −53.13 | (−65.57 to −40.69) | −1.95 | 3.04 | (1.54 to 4.53) | 0.11 |
Medical service capacity | ||||||
 Health workforce density | 670.32 | (538.49 to 802.14) | 24.58 | 126.11 | (67.86 to 184.37) | 4.63 |
Rigidity of response | ||||||
 Stringency index | 3.51 | (2.30 to 4.73) | 0.13 | −0.03 | (−0.05 to −0.02) | −0.00 |
Total differences | 2726.59 | |||||
Explained (due to characteristics) | 2493.43 (91.45%) | |||||
Unexplained (due to coefficients) | 233.15 (8.55%) | |||||