of the test group growth is greater than that of the control group. The three nutrition pairs show the following records of growth,—in number 7, the test case shows a growth of ·6 in. more than his control. Number 10 is the pair in which the growth is equal. In number 11 the test case again exceeds in growth by ·6 of an inch.
More reliable than height and weight considered separately, as an index of physical welfare, is weight in relation to height and age. Table V shows the improvement in this relationship for the two groups. The numbers in columns 1, 2, 4 and 5 show the per cent under or over weight of the individual cases, in relation to their respective heights and ages. The authority upon which the figures are based, is the table published by the American Child Health Association, giving standard weights for height and age in boys.
There was an average loss of ·28 per cent in the weight-height-age relationship for the test group, and of 2·11 per cent for the control group. The average improvement of the test group in excess of the control group is, then, 1·83 per cent. The median improvement of test group over and above control is 4·00 per cent. The test group is more variable than the control in improvement. The greatest improvement, 8 per cent, is found in both groups.
TABLE IV
Gain in Height—6 Months, 19 Pairs
| N[16] | Test Group (A) | Control Group (B) | Inches | ||||
| Test 1 | Test 2 | Gain | Test 1 | Test 2 | Gain | A-B | |
| 9 | 48·1 | 49·4 | 1·3 | 51·9 | 55·2 | 3·3 | -2·0 |
| 4 | 47·5 | 49·2 | 1·7 | 48·9 | 52·0 | 3·1 | -1·4 |
| 5 | 44·9 | 45·2 | ·3 | 46·6 | 48·1 | 1·5 | -1·2 |
| 6 | 43·1 | 43·9 | ·8 | 45·4 | 47·3 | 1·9 | -1·1 |
| 2 | 42·5 | 44·1 | 1·6 | 45·2 | 47·0 | 1·8 | -·2 |
| 28 | 54·9 | 55·8 | ·9 | 53·4 | 54·5 | 1·1 | -·2 |
| 16 | 51·6 | 52·3 | ·7 | 48·7 | 49·5 | ·8 | -·1 |
| 10 | 46·1 | 47·7 | 1·6 | 45·6 | 47·2 | 1·6 | 0 |
| 25 | 50·0 | 50·8 | ·8 | 50·2 | 50·9 | ·7 | ·1 |
| 1 | 46·0 | 47·6 | 1·6 | 46·4 | 47·8 | 1·4 | ·2 |
| 3 | 47·0 | 48·4 | 1·4 | 51·7 | 52·9 | 1·2 | ·2 |
| 8 | 50·8 | 51·8 | 1·0 | 46·8 | 47·6 | ·8 | ·2 |
| 14 | 51·0 | 51·6 | ·6 | 57·9 | 58·3 | ·4 | ·2 |
| 7 | 42·9 | 44·8 | 1·9 | 41·9 | 43·2 | 1·3 | ·6 |
| 11 | 45·8 | 47·7 | 1·9 | 43·6 | 44·9 | 1·3 | ·6 |
| 19 | 57·7 | 59·0 | 1·3 | 46·7 | 47·2 | ·5 | ·8 |
| 26 | 51·6 | 54·3 | 2·7 | 51·4 | 52·3 | ·9 | 1·8 |
| 22 | 53·0 | 56·4 | 3·4 | 56·8 | 58·1 | 1·3 | 2·1 |
| 13 | 61·5 | 65·0 | 3·5 | 56·8 | 57·8 | 1·0 | 2·5 |
| Av. | 49·26 | 50·79 | 1·53 | 50·62 | 1·36 | ·16 | |
| M | 1·4 | 1·3 | ·2 | ||||
| 75%ile | 1·9 | 1·75 | ·65 | ||||
| 25%ile | ·78 | ·8 | -·43 | ||||
| Q | ·56 | ·48 | ·54 | ||||
| P. E. (distribution) | ·53 | ·44 | ·44 | ||||
| P. E. (average) | ±·12 | ±·10 | ±·16 | ||||
| Av.=1 P. E. | |||||||
| M=1·25 P. E. | |||||||
The greatest loss, 10 per cent, is in the control group. Eight cases show a loss in comparison to their controls, and nine reveal a gain. On the whole, there is some significance in the small net improvement manifested by the test group. The average is 2·02 P. E.'s, and the median 4·40 P. E.'s.
The dynamometer results show no gain in strength of grip six months after operation. Indeed the average of the gains of the operative cases is slightly less than the average gain of the controls. Comparing the test group with the control, we find the average of the differences to be -·24. But the variability is so high (P. E. = ±·48) as to render this figure unreliable. The greatest loss in strength of grip is found in the control group, but the greatest gain is also in this group. Seven cases in the test group show a loss, as compared with only three control cases. In eight, or one-half of the sixteen cases, the control member of a pair gained more than the test member. Considering the three pairs of nutrition cases, we find that in pair number 7 the test case loses 1·5 Kg. when compared with the control; and in pair number 10, 6·5 Kg., while the test case in pair 11 gains 4 Kg. The conclusion from the data would seem to be that, within the space of six months at any rate, operation for adenoids and tonsils brings about no increase in strength of grip.