Group | Length (µm) | χ 2 | p | ||
---|---|---|---|---|---|
Mean ± SD | Median | range | |||
1 (n = 5169) | 21.27 ± 18.55 | 18.06 | 1.97–504.67 | 0.826 | 0.843 |
2 (n = 5311) | 20.87 ± 16.60 | 17.36 | 2.11–215.25 | ||
3 (n = 4971) | 20.97 ± 16.68 | 17.36 | 1.92–269.29 | ||
4 (n = 4022) | 22.70 ± 16.04 | 20.83 | 2.39–190.67 | ||
Total | 21.38 ± 17.06 | 18.34 | 1.92–504.67 |