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

Table 14: Calculation of 1 st percentile MIDDLE FINGER tip length in mm (Method 1)
Age
1 st %ile middle finger
length
% growth in finger
length between age
groups
0-3mo 20.2 14.8 5.11
4-6 mo 23.7 11.2 5.75
7-9 mo 26.7 4.2 6.00
10-12 mo 27.85 11.7 6.79
13-18 mo 31.5 3.6 7.05
19-24 mo 32.7 6.2 7.51
2-2.5 yrs 34.85 8.13 8.18
2.5-3 .5 yrs 37.93 1.94 8.34
3.5-4.5 yrs 38.7 7.2 9.34
4.5-5.5 yrs 41.68
1 st %ile finger tip length
Table 15: Calculation of 99 th percentile MIDDLE FINGER tip length in mm (Method 1)
Age 99 th %ile middle finger
length – calculated
data
% growth in overall
finger length between
age groups
0-3mo 38.82 8.27 13.04
4-6 mo 42.32 6.62 13.96
7-9 mo 45.32 -2.64 13.60
10-12 mo 44.16 2.93 14.02
13-18 mo 45.5 11.36 15.81
19-24 mo 51.32 -0.32 15.76
2-2.5 yrs 51.16 3.61 16.35
2.5-3.5 yrs 53.08 7.41 17.66
3.5-4.5 yrs 57.32 4.97 18.66
4.5-5.5 yrs 60.32
99 th % ile finger tip
length
Method 2 uses the percentage of finger tip to overall finger length for each age group in the 2.5 years-3.5
years age groups (the only age for which all data are available). The same percentage was then
assumed for younger children (hence the data in brackets in Tables 16, 17 and 18). This is based on the
assumption that the proportion of the finger tip to the overall finger length is the same for children under
2.5 years as it is for children over 2.5 years. These results are shown in Table 16 (mean values), Table
17 (1 st percentile) and Table 18 (99 th percentile).
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