Table 2. Differences in the confirmed cases over population size per 100000 at every 5 consecutive days (CCOPSPTT) among five types of cities outside and within Hubei province from 25th January to 29th February, 2020.
| Types | Date | City types | Statistical result | ||||||
|---|---|---|---|---|---|---|---|---|---|
| SL | VL | L | M | S | chi-squared | df | p-values | ||
| Hubei province | 25th Jan | 6×E-3 | / | (3±2)×E-4a | (5±4)×E-4a | (1±2)×E-4a | 3.66 | 2 | 0.16 |
| 30th Jan | 0.02 | / | (3±1)×E-3a | (2±1)×E-3a | (10±8)×E-4a | 3.67 | 2 | 0.16 | |
| 4th Feb | 0.06 | / | (5±2)×E-3a | (4±4)×E-3a | (2±1)×E-3 | 5.94 | 2 | 0.10 | |
| 9th Feb | 0.09 | / | (5±3)×E-3a | (2±2)×E-3a | (2±1)×E-3a | 2.62 | 2 | 0.27 | |
| 14th Feb | 0.21 | / | (3±2)×E-3a | (2±2)×E-3a | (2±1)×E-3a | 1.02 | 2 | 0.60 | |
| 19th Feb | 0.07 | / | (3±4)×E-3a | (4±4)×E-3a | (2±3)×E-3a | 0.13 | 2 | 0.94 | |
| 24th Feb | 0.02 | / | (7±5)×E-4a | (4±2)×E-4a | (3±4)×E-4a | 1.50 | 2 | 0.47 | |
| 29th Feb | 0.02 | / | (1±1)×E-4a | (2±2)×E-5a | (2±2)×E-5a | 0.99 | 2 | 0.61 | |
| Other provinces | 25th Jan | (2±2)×E-4a | (4±4)×E-5b | (2±3)×E-5c | (2±3)×E-5c | (0.6±1)×E-5d | 105.38 | 4 | <0.001 |
| 30th Jan | (5±4)×E-4a | (2±3)×E-4a | (8±8)×E-5b | (7±7)×E-5b | (3±4)×E-5c | 123.61 | 4 | <0.001 | |
| 4th Feb | (7±5)×E-4a | (3±3)×E-4a | (1±1)×E-4b | (1±1)×E-4b | (4±6)×E-5c | 111.96 | 4 | <0.001 | |
| 9th Feb | (4±3)×E-4a | (2±2)×E-4a | (0.9±1)×E-4b | (0.7±1)×E-4b | (3±6)×E-5c | 99.29 | 4 | <0.001 | |
| 14th Feb | (2±2)×E-4a | (1±1)×E-4a | (6±7)×E-5b | (4±6)×E-5b | (2±4)×E-5c | 82.88 | 4 | <0.001 | |
| 19th Feb | (7±6)×E-5a | (4±5)×E-5a | (1±2)×E-5bc | (1±2)×E-5b | (0.8±2)×E-5c | 57.18 | 4 | <0.001 | |
| 24th Feb | (3±4)×E-5a | (0.6±2)×E-5b | (0.4±3)×E-4b | (2±7)×E-6bc | (2±7)×E-6c | 50.88 | 4 | <0.001 | |
| 29th Feb | (0.9±3)×E-5a | (1±6)×E-5ab | (0.9±3)×E-6ab | (0.8±8)×E-6b | (0.5±2)×E-5ab | 11.88 | 4 | <0.05 | |
Different lowercase letters indicate the significant differences in the confirmed cases among the different cites, whereas the same uppercase letters show the non-significant differences. SL, VL, L, M and S refers to super large-, very large-, large-, medium- and small-sized cities, respectively. “/” indicates no data in VL because there is no very large-sized city in Hubei province.