DATA DESCRIPTION:
Kyphosis:   a character variable telling whether a postoperative deformity
       (kyphosis) is "present" or "absent".
Age:   the age of the child in months.
Number:   the number of vertebrae involved in the operation.
Start:    the beginning of the range of vertebrae involved in the
       operation.

Id Kyphosis Age Number Start 
 1   absent  71      3     5
 2   absent 158      3    14
 3  present 128      4     5
 4   absent   2      5     1
 5   absent   1      4    15
 6   absent   1      2    16
 7   absent  61      2    17
 8   absent  37      3    16
 9   absent 113      2    16
10  present  59      6    12
11  present  82      5    14
12   absent 148      3    16
13   absent  18      5     2
14   absent   1      4    12
16   absent 168      3    18
17   absent   1      3    16
18   absent  78      6    15
19   absent 175      5    13
20   absent  80      5    16
21   absent  27      4     9
22   absent  22      2    16
23  present 105      6     5
24  present  96      3    12
25   absent 131      2     3
26  present  15      7     2
27   absent   9      5    13
29   absent   8      3     6
30   absent 100      3    14
31   absent   4      3    16
32   absent 151      2    16
33   absent  31      3    16
34   absent 125      2    11
35   absent 130      5    13
36   absent 112      3    16
37   absent 140      5    11
38   absent  93      3    16
39   absent   1      3     9
40  present  52      5     6
41   absent  20      6     9
42  present  91      5    12
43  present  73      5     1
44   absent  35      3    13
45   absent 143      9     3
46   absent  61      4     1
47   absent  97      3    16
48  present 139      3    10
49   absent 136      4    15
50   absent 131      5    13
51  present 121      3     3
52   absent 177      2    14
53   absent  68      5    10
54   absent   9      2    17
55  present 139     10     6
56   absent   2      2    17
57   absent 140      4    15
58   absent  72      5    15
59   absent   2      3    13
60  present 120      5     8
61   absent  51      7     9
62   absent 102      3    13
63  present 130      4     1
64  present 114      7     8
65   absent  81      4     1
66   absent 118      3    16
67   absent 118      4    16
68   absent  17      4    10
69   absent 195      2    17
70   absent 159      4    13
71   absent  18      4    11
72   absent  15      5    16
73   absent 158      5    14
74   absent 127      4    12
75   absent  87      4    16
76   absent 206      4    10
77   absent  11      3    15
78   absent 178      4    15
79  present 157      3    13
80   absent  26      7    13
81   absent 120      2    13
82  present  42      7     6
83   absent  36      4    13