Table 2. The variables related to the severe disease in different phases of epidemic waves in four provinces.
| Characteristics | Epidemic phases | Khorasan Razavi | P | Khuzestan | P | Kurdistan | P | Mazand aran | P | Total population |
|---|---|---|---|---|---|---|---|---|---|---|
| Death No. (%) | <0.001 | <0.001 | 0.012 | <0.001 | ||||||
| Before the peak | 245 (22.58) | 146 (14.11) | 58 (14.79) | 24 (8.42) | 473 (16.91) | |||||
| During the peak | 1582 (27.11) | 1904 (22.11) | 220 (21.86) | 646 (12.70) | 4352(21.19) | |||||
| After the peak | 185 (22.50) | 173 (27.03) | 39 (19.50) | 44 (11.28) | 441 (2149) | |||||
| Hospitalization in ICU / CCU No. (%) | 0.031 | <0.001 | 0.064 | 0.737 | ||||||
| Before the peak | 151 (13.91) | 119 (11.50) | 31 (7.90) | 34 (11.92) | 335 (11.98) | |||||
| During the peak | 935 (16.02) | 1227 (14.24) | 123 (12.22) | 684 (13.45) | 2969 (14.45) | |||||
| After the peak | 151 (18.36) | 180 (28.12) | 24 (12.00) | 54 (13.84) | 409 (19.93) | |||||
| Before the peak | 151 (13.91) | 119 (11.50) | 31 (7.90) | 34 (11.92) | 335 (11.98) | |||||
| During the peak | 935 (16.02) | 1227 (14.24) | 123 (12.22) | 684 (13.45) | 2969 (14.45) | |||||
| After the peak | 151 (18.36) | 180 (28.12) | 24 (12.00) | 54 (13.84) | 409 (19.93) | |||||
| Intubation No. (%) | <0.001 | 0.027 | 0.024 | <0.001 | ||||||
| Before the peak | 152 (14.00) | 97 (9.38) | 18 (4.59) | 12 (4.21) | 279 (9.97) | |||||
| During the peak | 595 (10.19) | 985 (11.43) | 87 (8.64) | 236 (4.64) | 1903 (9.26) | |||||
| After thepeak | 63 (7.66) | 87 (13.59) | 12 (6.00) | 35 (8.97) | 197 (9.60) | |||||
| Loss of consciousness No. (%) | <0.001 | <0.001 | 0.034 | 0.095 | ||||||
| Before the peak | 126 (11.61) | 20 (1.93) | 8 (2.04) | 3 (1.05) | 157 (5.61) | |||||
| During the peak | 482(8.26) | 449 (5.21) | 43 (4.27) | 149 (2.93) | 1123 (5.46) | |||||
| After the peak | 68 (8.27) | 68 (10.62) | 3 (1.50) | 15 (3.82) | 154 (7.50) | |||||
| Oxygen saturation (<93%) No. (%) | <0.001 | 0.015 | <0.001 | <0.001 | ||||||
| Before the peak | 629 (57.97) | 287 (27.75) | 174 (44.38) | 38 (13.33) | 1128
(40.34) |
|||||
| During the peak | 3976 (68.15) | 2752 (31.95) | 727 (72.26) | 1290 (25.37) | 8745 (42.58) | |||||
| After the peak | 520 (63.26) | 213 (33.28) | 148 (74.00) | 105 (26.92) | 986 (48.05) | |||||
| Respiratory Distress No. (%) | <0.001 | <0.001 | <0.001 | <0.001 | ||||||
| Before the peak | 675 (62.21) | 339 (32.78) | 166 (42.34) | 86 (30.17) | 1266(45.27) | |||||
| During the peak | 4029 (69.06) | 4650 (54.00) | 635 (63.12) | 2297 (45.18) | 11611 (56.54) | |||||
| After the peak | 511 (62.16) | 358 (55.93) | 121 (60.50) | 152 (38.97) | 1142 (55.65) | |||||
| Use of ambulance service No. (%) | 0.072 | <0.001 | 0.062 | <0.001 | ||||||
| Before the peak | 323 (29.76) | 228 (22.05) | 23 (5.86) | 21 (7.36) | 595 (21.28) | |||||
| During the peak | 1685 (28.88) | 1321 (15.34) | 138 (13.71) | 310 (6.09) | 3454 (16.82) | |||||
| After the peak | 246 (29.92) | 135 (21.09) | 16 (8.00) | 35 (8.97) | 432 (21.05) |