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. 2022 Oct 3;12:16522. doi: 10.1038/s41598-022-20263-y

Table 2.

The impact of late 2019 air passenger traffic on the precocity of COVID-19 outbreaks (calendar week of occurrence of 1st and 10th death) [2A: traffic from Chinese airports; 2B: traffic from other airports].

Source: Sub-National COVID-19 Incidence and Determinants Dataset.

DV: Calendar week of 1st or 10th COVID-19 death (1) (2) (3) (4) (5) (6) (7) (8)
Wk 1st Wk 1st Wk 1st Wk 1st Wk 10th Wk 10th Wk 10th Wk 10th
2A: Airline passengers from Chinese airports
No airport in region 0.122 (0.398) − 0.239 (0.391) 0.343 (0.345) − 0.044 (0.333) 2.051* (0.810) 0.975 (0.764) 1.903** (0.697) 1.378* (0.677)
Inbound passengers (end 2019) − 1.130*** (0.269) − 0.049 (0.332) − 0.489 (0.307) − 0.199 (0.297) − 1.592** (0.536) 0.864 (0.633) − 0.112 (0.627) − 0.439 (0.609)
Airport centrality (end 2019) − 0.442 (0.248) − 0.346 (0.261) 0.026 (0.230) − 0.041 (0.219) − 0.840 (0.494) − 0.346 (0.497) 0.102 (0.454) − 0.100 (0.434)
Population − 2.730*** (0.608) − 2.610*** (0.580) − 2.611*** (0.554) − 5.127*** (1.172) − 4.146*** (1.158) − 4.327*** (1.113)
Population density (pop/km2) − 0.280 (0.207) − 0.201 (0.181) − 0.304 (0.173) − 0.640 (0.395) − 0.659 (0.356) − 0.812* (0.345)
Real GDP pc PPP − 0.413** (0.136) 0.041 (0.130) 0.173 (0.131) − 1.874*** (0.294) − 0.483 (0.305) − 0.372 (0.315)
Hospital beds per 1000 residents 0.207 (0.249) 1.847*** (0.493)
Share of 65 +  -0.699*** (0.188) -1.512*** (0.390)
Cardiovascular death rate 0.901*** (0.249) − 0.115 (0.514)
Cancer death rate 0.313 (0.186) 1.141** (0.379)
Prevalence of adult obesity − 0.430 (0.354) − 2.071** (0.718)
Observations 453 453 453 453 429 429 429 429
R-squared 0.056 0.122 0.345 0.423 0.054 0.192 0.359 0.429
continent fixed effects No No Yes Yes No No Yes Yes
2B: Airline passengers from non-Chinese airports
No airport in region − 0.203 (0.393) − 0.307 (0.389) 0.216 (0.341) − 0.103 (0.329) 1.341 (0.793) 0.947 (0.763) 1.767* (0.690) 1.256 (0.667)
Inbound passengers (end 2019) − 1.229*** (0.192) − 0.439 (0.268) − 0.406 (0.236) − 0.421 (0.234) − 2.435*** (0.381) − 0.345 (0.530) − 0.451 (0.480) 0.138 (0.476)
Airport centrality (end 2019) − 0.120 (0.148) 0.042 (0.155) 0.114 (0.138) 0.139 (0.132) 0.175 (0.290) 0.436 (0.297) 0.382 (0.272) 0.182 (0.262)
Population − 2.664*** (0.735) − 3.491*** (0.660) − 2.773*** (0.679) − 4.602** (1.422) − 5.006*** (1.312) − 7.148*** (1.359)
Population density (pop/km2) − 0.285 (0.202) − 0.167 (0.176) − 0.266 (0.170) − 0.661 (0.389) − 0.624 (0.349) − 0.864* (0.338)
Real GDP pc PPP − 0.353* (0.145) 0.065 (0.135) 0.206 (0.135) − 1.804*** (0.323) − 0.414 (0.323) − 0.515 (0.329)
Hospital beds per 1000 residents 0.225 (0.247) 1.946*** (0.490)
Share of 65 +  − 0.675*** (0.187) − 1.459*** (0.388)
Cardiovascular death rate 0.834*** (0.247) − 0.154 (0.510)
Cancer death rate 0.311 (0.183) 1.133** (0.373)
Prevalence of adult obesity − 0.333 (0.357) − 2.140** (0.720)
Observations 452 452 452 452 428 428 428 428
R-squared 0.110 0.144 0.366 0.440 0.116 0.193 0.367 0.439
continent fixed effects No No Yes Yes No No Yes Yes

OLS regressions without and with continent fixed effects.

Standard errors in parentheses. *p < 0.05, **p < 0.01, ***p < 0.001.