Requirements for finger entrapment in European safety ... - ANEC

Table 18: Calculation of 99 th percentile MIDDLE FINGER tip length in mm (Method 2)
Age 99 th %ile middle finger % difference between length 99 th &ile finger tip
length
of finger and finger tip length
0-3mo 38.82 (32) 12.42
4-6 mo 42.32 (32) 13.54
7-9 mo 45.32 (32) 14.50
10-12 mo 44.16 (32) 14.13
13-18 mo 45.49 (32) 14.56
19-24 mo 51.32 (32) 16.42
2-2.5 yrs 51.16 32 16.37
2.5-3.5 yrs 53.07 32 17.66
3.5-4.5 yrs 57.32 32 18.66
4.5-5.5 yrs 60.32
Comparison of the two methods of calculating the finger tip data is shown in Table 19. It shows a small
deviation and it shows that these values can be used to provide a reliable estimation.
Table 19: Comparison of the calculated data for MIDDLE FINGER tip length (mm)
Age Mean 1 st %ile 99 th %ile
Method 1 Method 2 Method 1 Method 2 Method 1 Method 2
0-3mo 8.94 8.60 5.11 4.84 13.04 12.42
4-6 mo 9.75 9.62 5.75 5.68 13.96 13.54
7-9 mo 9.75 10.5 6.00 6.40 13.60 14.50
10-12 mo 10.43 10.5 6.79 6.68 14.02 14.13
13-18 mo 11.38 11.23 7.05 7.56 15.81 14.56
19-24 mo 11.65 12.25 7.51 7.84 15.76 16.42
2-2.5 yrs 12.32 12.54 8.18 8.36 16.35 16.37
2.5-3.5 yrs 13 13 8.34 8.34 17.66 17.66
3.5-4.5 yrs 13.39 14 9.34 18.66 18.66
The average of the two estimations for each value were therefore used. Table 20 shows that the
estimated 1 st percentile finger tip length of the middle finger for the lower age limit at risk (7-9 months) is
6.2 mm (highlighted in yellow).
21