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Table 1 Summary of daily death counts and environmental parameters included in the analysis

From: Geomagnetic disturbances driven by solar activity enhance total and cardiovascular mortality risk in 263 U.S. cities

Variable Overall Winter Spring Summer Fall
Daily Mortality (deaths/day) Mean (SD)     
 Total 15.3 (21.5) 15.7 (23.7) 14.4 (21.4) 13.3 (20) 13.9 (20.7)
 CVD 5 (8.3) 5.4 (9.3) 4.9 (8.3) 4.5 (7.6) 4.6 (7.9)
 MI 1.2 (2.4) 1.4 (2.7) 1.3 (2.4) 1.1 (2.2) 1.2 (2.3)
 STROKE 1 (1.6) 1.03 (1.7) 0.9 (1.6) 0.8 (1.5) 0.9 (1.5)
Environmental Parameters
 Temperature (°C) 14.2 (10.1) 3.9 (8.5) 13.6 (7.7) 23.9 (4.26) 15.07 (7.6)
Z-score 0 (1.0) −1.04 (0.8) −0.05 (0.7) 0.9 (0.4) 0.1 (0.7)
 Relative Humidity (%) 66.2 (16.2) 69.4 (16.1) 69.5 (15.7) 62.1 (16.6) 65.8 (15.6)
Z-score 0.01 (1.0) 0.2 (1.0) −0.25 (1.0) 0.01 (0.9) 0.1 (0.9)
 Kp_index 16.5 (9.4) 15.8 (9.1) 17.3 (9.6) 15.8 (8.8) 17 (10.0)
Z-score 0.02 (1.0) −0.05 (0.9) 0.1 (1.0) −0.05 (0.9) 0.07 (1.0)
 Number of GMD storms (Kp index > 5; ap index > 29) 936,368 154,316 290,004 212,180 279,868
 24-h Average PM2.5 (μg/m3) 12.6 (7.5) 13.0 (7.8) 11.2 (6.2) 14.3 (8.2) 12 (7.4)
Z-score 0.05 (1.0) 0.13 (1.0) −0.13 (0.8) 0.2 (1.1) −0.04 (1.0)