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result sql = Hypothesis: decreased use of pediatric aspirin has contributed to the increasing prevalence of childhood asthma.
Hypothesis: decreased use of pediatric aspirin has contributed to the increasing prevalence of childhood asthma.
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char = s;code = 115
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = c;code = 99
char = r;code = 114
char = e;code = 101
char = a;code = 97
char = s;code = 115
char = e;code = 101
char = ;code = 32
char = a;code = 97
char = c;code = 99
char = c;code = 99
char = e;code = 101
char = l;code = 108
char = e;code = 101
char = r;code = 114
char = a;code = 97
char = t;code = 116
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = u;code = 117
char = p;code = 112
char = w;code = 119
char = a;code = 97
char = r;code = 114
char = d;code = 100
char = ;code = 32
char = b;code = 98
char = e;code = 101
char = g;code = 103
char = i;code = 105
char = n;code = 110
char = n;code = 110
char = i;code = 105
char = n;code = 110
char = g;code = 103
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = e;code = 101
char = a;code = 97
char = r;code = 114
char = l;code = 108
char = y;code = 121
char = ;code = 32
char = 1;code = 49
char = 9;code = 57
char = 8;code = 56
char = 0;code = 48
char = s;code = 115
char = ;code = 32
char = w;code = 119
char = h;code = 104
char = e;code = 101
char = n;code = 110
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = u;code = 117
char = s;code = 115
char = e;code = 101
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = p;code = 112
char = e;code = 101
char = d;code = 100
char = i;code = 105
char = a;code = 97
char = t;code = 116
char = r;code = 114
char = i;code = 105
char = c;code = 99
char = ;code = 32
char = a;code = 97
char = s;code = 115
char = p;code = 112
char = i;code = 105
char = r;code = 114
char = i;code = 105
char = n;code = 110
char = ;code = 32
char = d;code = 100
char = e;code = 101
char = c;code = 99
char = r;code = 114
char = e;code = 101
char = a;code = 97
char = s;code = 115
char = e;code = 101
char = d;code = 100
char = .;code = 46
char = ;code = 32
char = D;code = 68
char = u;code = 117
char = r;code = 114
char = i;code = 105
char = n;code = 110
char = g;code = 103
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = r;code = 114
char = e;code = 101
char = s;code = 115
char = o;code = 111
char = l;code = 108
char = u;code = 117
char = t;code = 116
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = c;code = 99
char = o;code = 111
char = m;code = 109
char = m;code = 109
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = r;code = 114
char = e;code = 101
char = s;code = 115
char = p;code = 112
char = i;code = 105
char = r;code = 114
char = a;code = 97
char = t;code = 116
char = o;code = 111
char = r;code = 114
char = y;code = 121
char = ;code = 32
char = v;code = 118
char = i;code = 105
char = r;code = 114
char = a;code = 97
char = l;code = 108
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = f;code = 102
char = e;code = 101
char = c;code = 99
char = t;code = 116
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = s;code = 115
char = ,;code = 44
char = ;code = 32
char = p;code = 112
char = r;code = 114
char = o;code = 111
char = s;code = 115
char = t;code = 116
char = a;code = 97
char = g;code = 103
char = l;code = 108
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = i;code = 105
char = n;code = 110
char = ;code = 32
char = E;code = 69
char = 2;code = 50
char = ;code = 32
char = (;code = 40
char = P;code = 80
char = G;code = 71
char = E;code = 69
char = 2;code = 50
char = );code = 41
char = ;code = 32
char = i;code = 105
char = s;code = 115
char = ;code = 32
char = p;code = 112
char = r;code = 114
char = o;code = 111
char = d;code = 100
char = u;code = 117
char = c;code = 99
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = r;code = 114
char = o;code = 111
char = u;code = 117
char = g;code = 103
char = h;code = 104
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = a;code = 97
char = c;code = 99
char = t;code = 116
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = s;code = 115
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = c;code = 99
char = y;code = 121
char = c;code = 99
char = l;code = 108
char = o;code = 111
char = o;code = 111
char = x;code = 120
char = y;code = 121
char = g;code = 103
char = e;code = 101
char = n;code = 110
char = a;code = 97
char = s;code = 115
char = e;code = 101
char = -;code = 45
char = 2;code = 50
char = ;code = 32
char = (;code = 40
char = C;code = 67
char = O;code = 79
char = X;code = 88
char = -;code = 45
char = 2;code = 50
char = );code = 41
char = .;code = 46
char = ;code = 32
char = A;code = 65
char = s;code = 115
char = p;code = 112
char = i;code = 105
char = r;code = 114
char = i;code = 105
char = n;code = 110
char = ,;code = 44
char = ;code = 32
char = b;code = 98
char = u;code = 117
char = t;code = 116
char = ;code = 32
char = n;code = 110
char = o;code = 111
char = t;code = 116
char = ;code = 32
char = a;code = 97
char = c;code = 99
char = e;code = 101
char = t;code = 116
char = a;code = 97
char = m;code = 109
char = i;code = 105
char = n;code = 110
char = o;code = 111
char = p;code = 112
char = h;code = 104
char = e;code = 101
char = n;code = 110
char = ,;code = 44
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = h;code = 104
char = i;code = 105
char = b;code = 98
char = i;code = 105
char = t;code = 116
char = s;code = 115
char = ;code = 32
char = C;code = 67
char = O;code = 79
char = X;code = 88
char = -;code = 45
char = 2;code = 50
char = ;code = 32
char = a;code = 97
char = c;code = 99
char = t;code = 116
char = i;code = 105
char = v;code = 118
char = i;code = 105
char = t;code = 116
char = y;code = 121
char = .;code = 46
char = ;code = 32
char = A;code = 65
char = s;code = 115
char = ;code = 32
char = P;code = 80
char = G;code = 71
char = E;code = 69
char = 2;code = 50
char = ;code = 32
char = p;code = 112
char = r;code = 114
char = o;code = 111
char = m;code = 109
char = o;code = 111
char = t;code = 116
char = e;code = 101
char = s;code = 115
char = ;code = 32
char = T;code = 84
char = H;code = 72
char = 2;code = 50
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = h;code = 104
char = i;code = 105
char = b;code = 98
char = i;code = 105
char = t;code = 116
char = s;code = 115
char = ;code = 32
char = T;code = 84
char = H;code = 72
char = I;code = 73
char = ;code = 32
char = t;code = 116
char = y;code = 121
char = p;code = 112
char = e;code = 101
char = ;code = 32
char = c;code = 99
char = y;code = 121
char = t;code = 116
char = o;code = 111
char = k;code = 107
char = i;code = 105
char = n;code = 110
char = e;code = 101
char = ;code = 32
char = g;code = 103
char = e;code = 101
char = n;code = 110
char = e;code = 101
char = r;code = 114
char = a;code = 97
char = t;code = 116
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = ,;code = 44
char = ;code = 32
char = w;code = 119
char = e;code = 101
char = ;code = 32
char = h;code = 104
char = y;code = 121
char = p;code = 112
char = o;code = 111
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = s;code = 115
char = i;code = 105
char = z;code = 122
char = e;code = 101
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = a;code = 97
char = t;code = 116
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = d;code = 100
char = e;code = 101
char = c;code = 99
char = r;code = 114
char = e;code = 101
char = a;code = 97
char = s;code = 115
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = u;code = 117
char = s;code = 115
char = e;code = 101
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = a;code = 97
char = s;code = 115
char = p;code = 112
char = i;code = 105
char = r;code = 114
char = i;code = 105
char = n;code = 110
char = ;code = 32
char = m;code = 109
char = a;code = 97
char = y;code = 121
char = ;code = 32
char = b;code = 98
char = e;code = 101
char = ;code = 32
char = a;code = 97
char = ;code = 32
char = f;code = 102
char = a;code = 97
char = c;code = 99
char = t;code = 116
char = o;code = 111
char = r;code = 114
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = ;code = 32
char = f;code = 102
char = a;code = 97
char = c;code = 99
char = i;code = 105
char = l;code = 108
char = i;code = 105
char = t;code = 116
char = a;code = 97
char = t;code = 116
char = i;code = 105
char = n;code = 110
char = g;code = 103
char = ;code = 32
char = a;code = 97
char = l;code = 108
char = l;code = 108
char = e;code = 101
char = r;code = 114
char = g;code = 103
char = i;code = 105
char = c;code = 99
char = ;code = 32
char = s;code = 115
char = e;code = 101
char = n;code = 110
char = s;code = 115
char = i;code = 105
char = t;code = 116
char = i;code = 105
char = z;code = 122
char = a;code = 97
char = t;code = 116
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = a;code = 97
char = s;code = 115
char = t;code = 116
char = h;code = 104
char = m;code = 109
char = a;code = 97
char = ;code = 32
char = b;code = 98
char = y;code = 121
char = ;code = 32
char = a;code = 97
char = u;code = 117
char = g;code = 103
char = m;code = 109
char = e;code = 101
char = n;code = 110
char = t;code = 116
char = i;code = 105
char = n;code = 110
char = g;code = 103
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = r;code = 114
char = e;code = 101
char = l;code = 108
char = a;code = 97
char = t;code = 116
char = i;code = 105
char = v;code = 118
char = e;code = 101
char = ;code = 32
char = T;code = 84
char = H;code = 72
char = 1;code = 49
char = /;code = 47
char = T;code = 84
char = H;code = 72
char = 2;code = 50
char = ;code = 32
char = c;code = 99
char = y;code = 121
char = t;code = 116
char = o;code = 111
char = k;code = 107
char = i;code = 105
char = n;code = 110
char = e;code = 101
char = ;code = 32
char = i;code = 105
char = m;code = 109
char = b;code = 98
char = a;code = 97
char = l;code = 108
char = a;code = 97
char = n;code = 110
char = c;code = 99
char = e;code = 101
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = ;code = 32
char = g;code = 103
char = e;code = 101
char = n;code = 110
char = e;code = 101
char = t;code = 116
char = i;code = 105
char = c;code = 99
char = a;code = 97
char = l;code = 108
char = l;code = 108
char = y;code = 121
char = ;code = 32
char = p;code = 112
char = r;code = 114
char = e;code = 101
char = d;code = 100
char = i;code = 105
char = s;code = 115
char = p;code = 112
char = o;code = 111
char = s;code = 115
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = c;code = 99
char = h;code = 104
char = i;code = 105
char = l;code = 108
char = d;code = 100
char = r;code = 114
char = e;code = 101
char = n;code = 110
char = .;code = 46
char = <;code = 60
char = b;code = 98
char = r;code = 114
char = /;code = 47
char = >;code = 62
char = <;code = 60
char = b;code = 98
char = r;code = 114
char = /;code = 47
char = >;code = 62
char = <;code = 60
char = b;code = 98
char = >;code = 62
char = C;code = 67
char = O;code = 79
char = N;code = 78
char = C;code = 67
char = L;code = 76
char = U;code = 85
char = S;code = 83
char = I;code = 73
char = O;code = 79
char = N;code = 78
char = ;code = 32
char = :;code = 58
char = ;code = 32
char = <;code = 60
char = /;code = 47
char = b;code = 98
char = >;code = 62
char = W;code = 87
char = e;code = 101
char = ;code = 32
char = h;code = 104
char = a;code = 97
char = v;code = 118
char = e;code = 101
char = ;code = 32
char = p;code = 112
char = r;code = 114
char = e;code = 101
char = s;code = 115
char = e;code = 101
char = n;code = 110
char = t;code = 116
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = ;code = 32
char = h;code = 104
char = y;code = 121
char = p;code = 112
char = o;code = 111
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = s;code = 115
char = i;code = 105
char = s;code = 115
char = ;code = 32
char = b;code = 98
char = a;code = 97
char = s;code = 115
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = u;code = 117
char = p;code = 112
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = e;code = 101
char = p;code = 112
char = i;code = 105
char = d;code = 100
char = e;code = 101
char = m;code = 109
char = i;code = 105
char = o;code = 111
char = l;code = 108
char = o;code = 111
char = g;code = 103
char = i;code = 105
char = c;code = 99
char = ;code = 32
char = t;code = 116
char = r;code = 114
char = e;code = 101
char = n;code = 110
char = d;code = 100
char = s;code = 115
char = ,;code = 44
char = ;code = 32
char = k;code = 107
char = n;code = 110
char = o;code = 111
char = w;code = 119
char = n;code = 110
char = ;code = 32
char = b;code = 98
char = i;code = 105
char = o;code = 111
char = l;code = 108
char = o;code = 111
char = g;code = 103
char = i;code = 105
char = c;code = 99
char = ;code = 32
char = e;code = 101
char = f;code = 102
char = f;code = 102
char = e;code = 101
char = c;code = 99
char = t;code = 116
char = s;code = 115
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = c;code = 99
char = y;code = 121
char = t;code = 116
char = o;code = 111
char = k;code = 107
char = i;code = 105
char = n;code = 110
char = e;code = 101
char = s;code = 115
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = P;code = 80
char = G;code = 71
char = E;code = 69
char = 2;code = 50
char = ;code = 32
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = a;code = 97
char = l;code = 108
char = l;code = 108
char = e;code = 101
char = r;code = 114
char = g;code = 103
char = i;code = 105
char = c;code = 99
char = ;code = 32
char = s;code = 115
char = e;code = 101
char = n;code = 110
char = s;code = 115
char = i;code = 105
char = t;code = 116
char = i;code = 105
char = z;code = 122
char = a;code = 97
char = t;code = 116
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = ,;code = 44
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = a;code = 97
char = ;code = 32
char = p;code = 112
char = o;code = 111
char = t;code = 116
char = e;code = 101
char = n;code = 110
char = t;code = 116
char = i;code = 105
char = a;code = 97
char = l;code = 108
char = l;code = 108
char = y;code = 121
char = ;code = 32
char = r;code = 114
char = e;code = 101
char = l;code = 108
char = e;code = 101
char = v;code = 118
char = a;code = 97
char = n;code = 110
char = t;code = 116
char = ;code = 32
char = p;code = 112
char = h;code = 104
char = a;code = 97
char = r;code = 114
char = m;code = 109
char = a;code = 97
char = c;code = 99
char = o;code = 111
char = l;code = 108
char = o;code = 111
char = g;code = 103
char = i;code = 105
char = c;code = 99
char = ;code = 32
char = e;code = 101
char = f;code = 102
char = f;code = 102
char = e;code = 101
char = c;code = 99
char = t;code = 116
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = a;code = 97
char = s;code = 115
char = p;code = 112
char = i;code = 105
char = r;code = 114
char = i;code = 105
char = n;code = 110
char = ;code = 32
char = t;code = 116
char = o;code = 111
char = ;code = 32
char = e;code = 101
char = x;code = 120
char = p;code = 112
char = l;code = 108
char = a;code = 97
char = i;code = 105
char = n;code = 110
char = ;code = 32
char = a;code = 97
char = ;code = 32
char = c;code = 99
char = o;code = 111
char = m;code = 109
char = p;code = 112
char = o;code = 111
char = n;code = 110
char = e;code = 101
char = n;code = 110
char = t;code = 116
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = c;code = 99
char = r;code = 114
char = e;code = 101
char = a;code = 97
char = s;code = 115
char = i;code = 105
char = n;code = 110
char = g;code = 103
char = ;code = 32
char = p;code = 112
char = r;code = 114
char = e;code = 101
char = v;code = 118
char = a;code = 97
char = l;code = 108
char = e;code = 101
char = n;code = 110
char = c;code = 99
char = e;code = 101
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = c;code = 99
char = h;code = 104
char = i;code = 105
char = l;code = 108
char = d;code = 100
char = h;code = 104
char = o;code = 111
char = o;code = 111
char = d;code = 100
char = ;code = 32
char = a;code = 97
char = s;code = 115
char = t;code = 116
char = h;code = 104
char = m;code = 109
char = a;code = 97
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = U;code = 85
char = n;code = 110
char = i;code = 105
char = t;code = 116
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = S;code = 83
char = t;code = 116
char = a;code = 97
char = t;code = 116
char = e;code = 101
char = s;code = 115
char = .;code = 46
char = ;code = 32
char = W;code = 87
char = e;code = 101
char = ;code = 32
char = s;code = 115
char = u;code = 117
char = g;code = 103
char = g;code = 103
char = e;code = 101
char = s;code = 115
char = t;code = 116
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = i;code = 105
char = s;code = 115
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = o;code = 111
char = r;code = 114
char = y;code = 121
char = ;code = 32
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result sql = BACKGROUND : The prevalence of asthma, atopic eczema, and allergic rhinitis has increased over the last three decades in Western countries. Speculation on the causes of this trend have focused on changes in environmental factors. We hypothesize that the decreased use of aspirin in favor of acetaminophen, due to the association of aspirin with Reye's syndrome during febrile respiratory infections, may be contributing to these trends in the United States.

DATA SOURCES : A detailed literature search was conducted utilizing Medline. Studies considered relevant and important involving both humans and animals in English language were used.

HYPOTHESIS : In the United States, the documented prevalence of childhood asthma has increased since 1970, but the rate of this increase accelerated upward beginning in the early 1980s when the use of pediatric aspirin decreased. During the resolution of common respiratory viral infections, prostaglandin E2 (PGE2) is produced through the actions of cyclooxygenase-2 (COX-2). Aspirin, but not acetaminophen, inhibits COX-2 activity. As PGE2 promotes TH2 and inhibits THI type cytokine generation, we hypothesize that the decreased use of aspirin may be a factor in facilitating allergic sensitization and asthma by augmenting the relative TH1/TH2 cytokine imbalance in genetically predisposed children.

CONCLUSION : We have presented an hypothesis based upon epidemiologic trends, known biologic effects of cytokines and PGE2 on allergic sensitization, and a potentially relevant pharmacologic effect of aspirin to explain a component of the increasing prevalence of childhood asthma in the United States. We suggest this theory be examined further in animal models as well as in other countries where the prevalence of childhood asthma is increasing.

Publication: Ann. Allergy Asthma Immunol. 1998 Oct ;81(4)::347-51.
Publication Date: 1998 Oct
Study Author(s): Varner, A E;Busse, W W;Lemanske, R F;
Institution: Allergy Diagnostic, Beachwood, Ohio 44122, USA.
Shortcut link to this study:
BACKGROUND : The prevalence of asthma, atopic eczema, and allergic rhinitis has increased over the last three decades in Western countries. Speculation on the causes of this trend have focused on changes in environmental factors. We hypothesize that the decreased use of aspirin in favor of acetaminophen, due to the association of aspirin with Reye's syndrome during febrile respiratory infections, may be contributing to these trends in the United States.

DATA SOURCES : A detailed literature search was conducted utilizing Medline. Studies considered relevant and important involving both humans and animals in English language were used.

HYPOTHESIS : In the United States, the documented prevalence of childhood asthma has increased since 1970, but the rate of this increase accelerated upward beginning in the early 1980s when the use of pediatric aspirin decreased. During the resolution of common respiratory viral infections, prostaglandin E2 (PGE2) is produced through the actions of cyclooxygenase-2 (COX-2). Aspirin, but not acetaminophen, inhibits COX-2 activity. As PGE2 promotes TH2 and inhibits THI type cytokine generation, we hypothesize that the decreased use of aspirin may be a factor in facilitating allergic sensitization and asthma by augmenting the relative TH1/TH2 cytokine imbalance in genetically predisposed children.

CONCLUSION : We have presented an hypothesis based upon epidemiologic trends, known biologic effects of cytokines and PGE2 on allergic sensitization, and a potentially relevant pharmacologic effect of aspirin to explain a component of the increasing prevalence of childhood asthma in the United States. We suggest this theory be examined further in animal models as well as in other countries where the prevalence of childhood asthma is increasing.
PMID: 9809499

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