Table 1.
Comparison of baseline data
| Control group (n=65) | Research group (n=81) | t/χ2 | P | |
|---|---|---|---|---|
| Gender | ||||
| Male | 35 | 52 | ||
| Female | 30 | 29 | 1.605 | 0.205 |
| Age (years) | 45.14±9.80 | 46.70±10.09 | 0.947 | 0.345 |
| Stone diameter (mm) | 15.42±6.16 | 14.22±5.41 | 1.227 | 0.222 |
| Duration of the disease (months) | 26.45±4.86 | 27.63±4.40 | 1.521 | 0.131 |
| BMI (kg/m2) | 23.24±2.01 | 23.13±2.52 | 0.276 | 0.783 |
| Site | ||||
| Left kidney | 34 | 39 | ||
| Right kidney | 31 | 42 | 0.250 | 0.617 |
| Number of stones | ||||
| Single-shot | 26 | 36 | ||
| Frequent | 39 | 45 | 0.292 | 0.589 |
| Location of stones | ||||
| Renal calyces | 40 | 45 | ||
| Non-renal calyces | 25 | 36 | 0.531 | 0.466 |
| Degree of hydronephrosis | ||||
| No or slight water accumulation | 42 | 44 | ||
| Moderate or severe water accumulation | 23 | 37 | 1.579 | 0.209 |
| Blood creatinine (μmol/L) | 64.90±8.25 | 63.51±8.16 | 1.016 | 0.312 |
BMI: Body mass index.