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The age distribution and average age of the two groups
| Group | Number | Age distribution (years)
|
P-value | Average age (years) | P-value | |
|---|---|---|---|---|---|---|
| 20–34 | 35–40 | |||||
| Observation group | 24 | 16 | 8 | 1.00 | 33.5±1.92 | 0.92 |
| Control group | 23 | 18 | 5 | – | 33.3±1.68 | – |
Abbreviation: SD, standard deviation.
