Table 1.
General data of hospitalized patients with urolithiasis
| 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | |
|---|---|---|---|---|---|---|
| Number | 303,591 | 512,143 | 612,531 | 706,282 | 705,429 | 637,202 |
| Frequencya (%) | 3.0 | 3.3 | 3.5 | 3.6 | 3.8 | 4.0 |
| Frequencyb (%) | 0.2 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 |
| Age (years) | 54.1±15.2 | 54.6±15.1 | 55.0±15.1 | 55.3±15.0 | 55.6±15.0 | 55.9±14.9 |
| Age group (%)* | ||||||
| 18–45 | 29.4 | 27.8 | 26.7 | 25.8 | 24.8 | 23.8 |
| 46–65 | 46.9 | 47.5 | 47.9 | 48.2 | 48.4 | 48.8 |
| >65 | 23.7 | 24.6 | 25.4 | 26.1 | 26.8 | 27.4 |
| Males (%) Region (%) | 63.8 | 63.6 | 63.8 | 63.8 | 63.9 | 63.7 |
| South | 4.0 | 4.3 | 4.7 | 4.7 | 4.7 | 4.7 |
| Central | 3.2 | 3.3 | 3.7 | 4.1 | 4.1 | 4.5 |
| Southwest | 3.9 | 4.4 | 4.6 | 4.6 | 4.5 | 4.0 |
| East | 1.5 | 1.6 | 1.7 | 1.7 | 2.0 | 2.1 |
| Northwest | 1.5 | 1.6 | 1.7 | 1.7 | 2.0 | 2.1 |
| Northeast | 1.6 | 1.7 | 1.7 | 1.8 | 1.8 | 1.9 |
| North | 1.0 | 1.1 | 1.3 | 1.3 | 1.4 | 1.5 |
a
The proportion of urolithiasis patients to the inpatient in tertiary hospitals.
b
The proportion of urolithiasis patients to the total number of inpatients.
*
p < 0.001.