Table 1. Descriptive statistics of daily infectious pneumonia deaths in the elderly population, meteorological factors, and air pollutants in Jinan City from 2014 to 2022 (November to March).
| Variables | n (%) | Min | P 25 | M | P 75 | Max |
| Infectious pneumonia death counts | ||||||
| Abbreviation: Min=minimum; P
25=first quartile; M=median; P
75=third quartile; Max=maximum; T.=temperature; WS=wind speed; RH=relative humidity; PM
2.5=fine particulate matter; O
3=ozone.
| ||||||
| All pathogen | 4,284 (100.00) | 0 | 2 | 3 | 5 | 12 |
| Viral | 373 (8.71) | 0 | 0 | 0 | 0 | 4 |
| Bacterial | 1,017 (23.74) | 0 | 0 | 1 | 1 | 6 |
| Chlamydia | 7 (0.16) | 0 | 0 | 0 | 0 | 3 |
| Fungus | 77 (1.80) | 0 | 0 | 0 | 0 | 3 |
| Other infectious | 2,810 (65.59) | 0 | 1 | 2 | 3 | 11 |
| Death counts classified by gender | ||||||
| Male | 2,325 (54.27) | 0 | 1 | 2 | 3 | 8 |
| Female | 1,959 (45.73) | 0 | 0 | 1 | 2 | 8 |
| Death counts classified by area type | ||||||
| Urban | 3,249 (75.84) | 0 | 1 | 2 | 4 | 9 |
| Rural | 1,035 (24.16) | 0 | 0 | 1 | 1 | 6 |
| Meteorological factors | ||||||
| Min T. (℃) | 1,300 | −18.3 | -2.3 | 1.1 | 5.5 | 19.6 |
| Mean T. (℃) | 1,300 | −13.6 | 1.1 | 4.8 | 9.5 | 23.1 |
| WS (m/s) | 1,300 | 0.2 | 1.6 | 2.1 | 2.7 | 7.3 |
| RH (%) | 1,300 | 15 | 35 | 46 | 62 | 100 |
| Pressure (hPa) | 1,300 | 984 | 1,000 | 1,005 | 1,009 | 1,022 |
| Air pollution (μg/m 3) | ||||||
| PM 2.5 | 1,300 | 7 | 45 | 68 | 104 | 424 |
| O 3 | 1,300 | 5 | 46 | 63 | 87 | 243 |