Upper Lower
Early middle age URM1 ULM1 Total LRM1 LLM1 Total Grand total
Observed 36 34 70 31 31 61 131
Average 3.13 3.24 3.19 2.16 2.27 2.23 2.74
SD 0.99 1.05 1.01 0.9 0.87 0.86 1.06
Early middle age vs  Late middle age P-0.165 ns P=0.104 ns P<0.05 L>E P<0.05 L>E P=0.218 ns P<0.01 L>E P<0.05   L>E
Late middle age
Observed 11 9 20 8 7 15 35
Average 3.91 3.89 3.9 3.13 2.71 2.93 3.49
SD 1.64 1.05 1.37 1.25 0.76 1.03 1.31
I: Incisors; C: Canines; P: Premolars; M: Molars in tooth type distribution.
ns: not significant
E: Early middle age; L: Late middle age
Table 3: Alveoler resession of Somali people in Early middle age and Late middle age.
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