As was mentioned in the previous chapter, height and weight are of less significance when considered alone, than when taken in relation to each other and to the age of the individual. The gain in this weight-height-age relationship following upon operation for adenoids and tonsils, will be considered in the same manner as were weight and height gains. We have, then: TABLE XVII Height-Weight Relationship, Second Retests, 13 Pairs Showing changes in per cent over or underweight after 12 months' interval N[16] Test Group (A) Control Group (B) Test 1 Test 3 Change Test 1 Test 2 Change A-B 8 - 1 + 7 + 8 -13 0 +13 - 5 16 -16 -17 - 1 -13 - 9 + 4 - 5 11 - 3 - 6 - 3 - 9 -10 - 1 - 2 14 -13 - 6 + 7 - 5 + 4 + 9 - 2 19 + 6 +10 + 4 + 1 + 7 + 6 - 2 28 - 7 - 4 + 3 0 + 5 + 5 - 2 10 - 1 0 + 1 - 6 - 6 0 + 1 7 - 8 - 8 0 - 7 - 9 - 2 + 2 2 - 8 - 4 + 4 + 9 +10 + 1 + 3 4 - 7 - 4 + 3 -15 -15 0 + 3 1 0 + 6 + 6 + 8 + 5 - 3 + 9 13 -13 + 6 +19 -11 -12 - 1 +20 3 + 6 +13 + 7 - 5 -20 -15 +22 Av. - 5 - .54 4.46 - 5.08 3.85 1.23 3.23 M 4 - 2 6 75%ile 6.75 2.75 3 25%ile - 2.50 2.75 -2 Q 4.625 2.75 2.50 P. E. (distribution) 2.54 3.23 5.23 P. E. (average) +- .71 +- .90 +-1.15 Av.=2.81 P. E. M. =5.22 P. E. 6 months 12 months Average of gains of test group in excess of control 1.83 3.23 Median of gains of test group in excess of control 4.00 6 P. E. of difference .91 1.15 Average in terms of P. E. 2.02 2.81 Median in terms of P. E. 4.40 5.22