Table 2. Data for each age group (adult and senile) are expressed as the means ± SEM. The Mann-Whitney U test (SPSS v.21) test was used to analyse the statistical significance of differences in the mean values of the CSA, the lesser diameters of the type I and type II fibres and the number of type I and type II fibres of adult and old (senile) individuals. The significance level was set at P < 0.05.
| Type I fibres | Type II fibres | |||||||
|---|---|---|---|---|---|---|---|---|
| Group | CSA (μm2) | LD (μm) | N° | % | CSA (μm2) | LD (μm) | N° | % |
| Adult | 819.17 ± 201.99 | 11.35 ± 1 | 488 ± 174.94 | 35.18 ± 3.1 | 2,272.34 ± 679.64 | 18.10 ± 1.49 | 875.67 ± 222.04 | 64.82 ± 1.27 |
| Senile | 1,349.39 ± 134.86 | 14.11 ± 0.69 | 750.60 ± 167.17 | 48.18 ± 10.72 | 1,889.18 ± 435.95 | 16.19 ± 2.27 | 842 ± 306.07 | 51.82 ± 4.79 |
| Age effect (P) | 0.004 | 0.001 | 0.045 | 0.004 | NS | NS | NS | 0.004 |
The values are the means ± SEM for the 6 subjects in the adult group and the 5 subjects in the senile group. NS (Not significant). Cross sectional area [CSA (μm2)], lesser diameter [LD (μm)] and number (N°) of Type I fibres in the adult and senile specimens are significantly different (P < 0.05). P values refer to the significant significance of the age effects determined by one-way (age) analysis of variance.