Table 4. Comparison of the patients diagnosed with prostate cancer according to birth season (summer vs. winter).
| Variable | Birth season | p-value | ||
|---|---|---|---|---|
| Summer | Winter | |||
| Number of patients | 10 | 23 | ||
| Age (y) | 67.5±7.5 | 71.7±8.2 | 0.181 | |
| Digit ratio | 0.934±0.023 | 0.935±0.037 | 0.988 | |
| PV (mL) | 40.6±17.1 | 50.2±21.4 | 0.218 | |
| PSA (ng/mL) | 50.59±48.61 | 19.22±22.49 | 0.078 | |
| PSAD (ng/mL/mL) | 1.442±1.594 | 0.438±0.585 | 0.081 | |
| Number of positive cores | 8.70±3.34 | 6.35±3.95 | 0.111 | |
| Max core cancer volume (%) | 53.69±24.47 | 39.27±28.42 | 0.174 | |
| Max sum of GS | 7.30±1.06 | 6.83±0.98 | 0.223 | |
| 5 | 0 | 1 | 0.362 | |
| 6 | 2 | 9 | ||
| 7 | 5 | 7 | ||
| 8 | 1 | 5 | ||
| 9 | 2 | 1 | ||
| Max primary GS | 3.70±0.67 | 3.48±0.51 | 0.307 | |
| 3 | 4 | 12 | 0.284 | |
| 4 | 5 | 11 | ||
| 5 | 1 | 0 | ||
| Max secondary GS | 3.60±0.70 | 3.35±0.65 | 0.323 | |
| 2 | 0 | 1 | 0.768 | |
| 3 | 5 | 14 | ||
| 4 | 4 | 7 | ||
| 5 | 1 | 1 | ||
Values are presented as number only or mean±standard deviation.
PV, prostate volume; PSA, prostate-specific antigen; PSAD, PSA density; GS, Gleason score.
According to the definition of the solar season, the birth seasons were set as follows. Summer: May, June, and July and winter: November, December, and January.
Student’s t-test and chi-squared test were used.