Table 1 Analysis of the STR and ST measurements using mean ± SD and range (in millimeter)

Number of subjects

100

54

46

100

100

Number of the ears

200

108

92

100

100

STR-L

Mean ± SD

4.17 ± 0.86

4.28 ± 0.84

4.05 ± 0.88

4.22 ± 0.91

4.13 ± 0.81

Range

2.36–7.85

2.73–6.97

2.36–7.85

2.36–7.44

2.73–7.85

STR-W

Mean ± SD

3.55 ± 0.65

3.58 ± 0.7

3.52 ± 0.6

3.52 ± 0.62

3.59 ± 0.68

Range

1.04–5.57

1.04–5.57

2.04–5.48

2.37–5.48

1.04–5.57

STR-H

Mean ± SD

3.64 ± 0.69

3.66 ± 0.75

3.61 ± 0.62

3.6 ± 0.68

3.68 ± 0.7

Range

2.3–5.88

2.33–5.88

2.3–5.45

2.3–5.88

2.33–5.74

ST-L

Mean ± SD

2.52 ± 0.5

2.47 ± 0.5

2.56 ± 0.5

2.51 ± 0.51

2.52 ± 0.5

Range

1.36–3.97

1.39–3.63

1.36–3.97

1.36–3.63

1.39–3.97

ST-W

Mean ± SD

1.82 ± 0.78

1.78 ± 0.82

1.86 ± 0.73

1.75 ± 0.6

1.89 ± 0.93

Range

0.55–7.31

0.55–7.31

1.01–5.94

0.55–4.23

0.65–7.31