Percentis de perímetro cefálico de bebês para a idade, segundo a OMS (<24 meses)

 
Entrada
 
Sexo Feminino

 Masculino
Idade  
Perímetro Cefálico  

 
Resultados
 
 
Escore Z  
Percentil  
 
Precisão decimal  

 

 Interpretação do percentil do perímetro cefálico para a idade

 
Percentil <2: Microcefalia
Percentil >=2 e <98: Perímetro cefálico normal
Percentil >=98: Macrocefalia

 
 

 
Observações
  • A microcefalia é o perímetro cefálico maior que dois desvios padrão abaixo da média.
  • A macrocefalia é o perímetro cefálico maior que dois desvios padrão acima da média.
  • Nos extremos (>97º percentil ou <3º percentil), pequenas diferenças nos percentis representam diferenças clinicamente importantes. Nesses extremos, o escore Z é um reflexo mais preciso do quanto a medição desvia da média, sendo uma ferramenta útil para monitorar alterações.
  • Os dados LMS usados nesta calculadora são apresentados na tabela de dados abaixo.
  • Para todas as tabelas LMS, a fileira na tabela correspondente ao valor específico ao paciente é encontrada na primeira coluna da tabela; os valores a serem usados para L (o poder Box-Cox), M (a mediana) e S (o coeficiente de variação generalizado) na equação para o escore Z foram obtidos.
  • Os escores Z podem ser usados para fazer uma busca na tabela do percentil correspondente na Tabela Normal de Percentis para a tabela de escore Z (abaixo). Os números do lado esquerdo (eixo Y) da tabela representam o primeiro número e a primeira casa decimal do escore Z, enquanto os números ao longo da parte superior (eixo X) da tabela representam a segunda posição decimal do escore Z.

 
Equações utilizadas
 
EscoreZ = ((PerímetroCefálico/M)L - 1) / (L * S)
Percentil = ZparaPercentil(EscoreZ)

 

 
Exemplos
 
Escore Z Percentil equivalente
- 3,0
0,3
- 2,0
2,5
+ 2,0
97,5
+ 3,0
99,7

 
Referências
  1. LMS Parameters for Girls: Head-circumference-for-age. World Health Organization 2006, Child Growth Standards.
  2. LMS Parameters for Boys: Head-circumference-for-age. World Health Organization 2006, Child Growth Standards.

 

 LMS Parameters for Girls: Head-circumference-for-age

 
Age [months] Power [L] Median [M] Variation [S]
0 1 33.8787 0.03496
1 1 36.5463 0.03210
2 1 38.2521 0.03168
3 1 39.5328 0.03140
4 1 40.5817 0.03119
5 1 41.4590 0.03102
6 1 42.1995 0.03087
7 1 42.8290 0.03075
8 1 43.3671 0.03063
9 1 43.8300 0.03053
10 1 44.2319 0.03044
11 1 44.5844 0.03035
12 1 44.8965 0.03027
13 1 45.1752 0.03019
14 1 45.4265 0.03012
15 1 45.6551 0.03006
16 1 45.8650 0.02999
17 1 46.0598 0.02993
18 1 46.2424 0.02987
19 1 46.4152 0.02982
20 1 46.5801 0.02977
21 1 46.7384 0.02972
22 1 46.8913 0.02967
23 1 47.0391 0.02962
24 1 47.1822 0.02957

 

 LMS Parameters for Boys: Head-circumference-for-age

 
Age [months] Power [L] Median [M] Variation [S]
0 1 34.4618 0.03686
1 1 37.2759 0.03133
2 1 39.1285 0.02997
3 1 40.5135 0.02918
4 1 41.6317 0.02868
5 1 42.5576 0.02837
6 1 43.3306 0.02817
7 1 43.9803 0.02804
8 1 44.5300 0.02796
9 1 44.9998 0.02792
10 1 45.4051 0.02790
11 1 45.7573 0.02789
12 1 46.0661 0.02789
13 1 46.3395 0.02789
14 1 46.5844 0.02791
15 1 46.8060 0.02792
16 1 47.0088 0.02795
17 1 47.1962 0.02797
18 1 47.3711 0.02800
19 1 47.5357 0.02803
20 1 47.6919 0.02806
21 1 47.8408 0.02810
22 1 47.9833 0.02813
23 1 48.1201 0.02817
24 1 48.2515 0.02821

 

 Z-score to percentile table

 
Z 0 1 2 3 4 5 6 7 8 9
-3.0 0.13% 0.13% 0.13% 0.12% 0.12% 0.11% 0.11% 0.11% 0.10% 0.10%
-2.9 0.19% 0.18% 0.18% 0.17% 0.16% 0.16% 0.15% 0.15% 0.14% 0.14%
-2.8 0.26% 0.25% 0.24% 0.23% 0.23% 0.22% 0.21% 0.21% 0.20% 0.19%
-2.7 0.35% 0.34% 0.33% 0.32% 0.31% 0.30% 0.29% 0.28% 0.27% 0.26%
-2.6 0.47% 0.45% 0.44% 0.43% 0.41% 0.40% 0.39% 0.38% 0.37% 0.36%
-2.5 0.62% 0.60% 0.59% 0.57% 0.55% 0.54% 0.52% 0.51% 0.49% 0.48%
-2.4 0.82% 0.80% 0.78% 0.75% 0.73% 0.71% 0.70% 0.68% 0.66% 0.64%
-2.3 1.07% 1.04% 1.02% 0.99% 0.96% 0.94% 0.91% 0.89% 0.87% 0.84%
-2.2 1.39% 1.36% 1.32% 1.29% 1.26% 1.22% 1.19% 1.16% 1.13% 1.10%
-2.1 1.79% 1.74% 1.70% 1.66% 1.62% 1.58% 1.54% 1.50% 1.46% 1.43%
-2.0 2.28% 2.22% 2.17% 2.12% 2.07% 2.02% 1.97% 1.92% 1.88% 1.83%
-1.9 2.87% 2.81% 2.74% 2.68% 2.62% 2.56% 2.50% 2.44% 2.39% 2.33%
-1.8 3.59% 3.52% 3.44% 3.36% 3.29% 3.22% 3.14% 3.07% 3.01% 2.94%
-1.7 4.46% 4.36% 4.27% 4.18% 4.09% 4.01% 3.92% 3.84% 3.75% 3.67%
-1.6 5.48% 5.37% 5.26% 5.16% 5.05% 4.95% 4.85% 4.75% 4.65% 4.55%
-1.5 6.68% 6.55% 6.43% 6.30% 6.18% 6.06% 5.94% 5.82% 5.71% 5.59%
-1.4 8.08% 7.93% 7.78% 7.64% 7.49% 7.35% 7.22% 7.08% 6.94% 6.81%
-1.3 9.68% 9.51% 9.34% 9.18% 9.01% 8.85% 8.69% 8.53% 8.38% 8.23%
-1.2 11.51% 11.31% 11.12% 10.94% 10.75% 10.57% 10.38% 10.20% 10.03% 9.85%
-1.1 13.57% 13.35% 13.14% 12.92% 12.71% 12.51% 12.30% 12.10% 11.90% 11.70%
-1.0 15.87% 15.63% 15.39% 15.15% 14.92% 14.69% 14.46% 14.23% 14.01% 13.79%
-0.9 18.41% 18.14% 17.88% 17.62% 17.36% 17.11% 16.85% 16.60% 16.35% 16.11%
-0.8 21.19% 20.90% 20.61% 20.33% 20.05% 19.77% 19.49% 19.22% 18.94% 18.67%
-0.7 24.20% 23.89% 23.58% 23.27% 22.97% 22.66% 22.36% 22.07% 21.77% 21.48%
-0.6 27.43% 27.09% 26.76% 26.44% 26.11% 25.79% 25.46% 25.14% 24.83% 24.51%
-0.5 30.85% 30.50% 30.15% 29.81% 29.46% 29.12% 28.77% 28.43% 28.10% 27.76%
-0.4 34.46% 34.09% 33.72% 33.36% 33.00% 32.64% 32.28% 31.92% 31.56% 31.21%
-0.3 38.21% 37.83% 37.45% 37.07% 36.69% 36.32% 35.94% 35.57% 35.20% 34.83%
-0.2 42.07% 41.68% 41.29% 40.91% 40.52% 40.13% 39.74% 39.36% 38.97% 38.59%
-0.1 46.02% 45.62% 45.22% 44.83% 44.43% 44.04% 43.64% 43.25% 42.86% 42.47%
0.0 50.00% 50.40% 50.80% 51.20% 51.60% 51.99% 52.39% 52.79% 53.19% 53.59%
0.1 53.98% 54.38% 54.78% 55.17% 55.57% 55.96% 56.36% 56.75% 57.14% 57.54%
0.2 57.93% 58.32% 58.71% 59.10% 59.48% 59.87% 60.26% 60.64% 61.03% 61.41%
0.3 61.79% 62.17% 62.55% 62.93% 63.31% 63.68% 64.06% 64.43% 64.80% 65.17%
0.4 65.54% 65.91% 66.28% 66.64% 67.00% 67.36% 67.72% 68.08% 68.44% 68.79%
0.5 69.15% 69.50% 69.85% 70.19% 70.54% 70.88% 71.23% 71.57% 71.90% 72.24%
0.6 72.58% 72.91% 73.24% 73.57% 73.89% 74.22% 74.54% 74.86% 75.18% 75.49%
0.7 75.80% 76.12% 76.42% 76.73% 77.04% 77.34% 77.64% 77.94% 78.23% 78.52%
0.8 78.81% 79.10% 79.39% 79.67% 79.96% 80.23% 80.51% 80.79% 81.06% 81.33%
0.9 81.59% 81.86% 82.12% 82.38% 82.64% 82.89% 83.15% 83.40% 83.65% 83.89%
1.0 84.13% 84.38% 84.61% 84.85% 85.08% 85.31% 85.54% 85.77% 85.99% 86.21%
1.1 86.43% 86.65% 86.86% 87.08% 87.29% 87.49% 87.70% 87.90% 88.10% 88.30%
1.2 88.49% 88.69% 88.88% 89.07% 89.25% 89.44% 89.62% 89.80% 89.97% 90.15%
1.3 90.32% 90.49% 90.66% 90.82% 90.99% 91.15% 91.31% 91.47% 91.62% 91.77%
1.4 91.92% 92.07% 92.22% 92.36% 92.51% 92.65% 92.79% 92.92% 93.06% 93.19%
1.5 93.32% 93.45% 93.57% 93.70% 93.82% 93.94% 94.06% 94.18% 94.30% 94.41%
1.6 94.52% 94.63% 94.74% 94.85% 94.95% 95.05% 95.15% 95.25% 95.35% 95.45%
1.7 95.54% 95.64% 95.73% 95.82% 95.91% 95.99% 96.08% 96.16% 96.25% 96.33%
1.8 96.41% 96.49% 96.56% 96.64% 96.71% 96.78% 96.86% 96.93% 97.00% 97.06%
1.9 97.13% 97.19% 97.26% 97.32% 97.38% 97.44% 97.50% 97.56% 97.62% 97.67%
2.0 97.73% 97.78% 97.83% 97.88% 97.93% 97.98% 98.03% 98.08% 98.12% 98.17%
2.1 98.21% 98.26% 98.30% 98.34% 98.38% 98.42% 98.46% 98.50% 98.54% 98.57%
2.2 98.61% 98.65% 98.68% 98.71% 98.75% 98.78% 98.81% 98.84% 98.87% 98.90%
2.3 98.93% 98.96% 98.98% 99.01% 99.04% 99.06% 99.09% 99.11% 99.13% 99.16%
2.4 99.18% 99.20% 99.22% 99.25% 99.27% 99.29% 99.31% 99.32% 99.34% 99.36%
2.5 99.38% 99.40% 99.41% 99.43% 99.45% 99.46% 99.48% 99.49% 99.51% 99.52%
2.6 99.53% 99.55% 99.56% 99.57% 99.59% 99.60% 99.61% 99.62% 99.63% 99.64%
2.7 99.65% 99.66% 99.67% 99.68% 99.69% 99.70% 99.71% 99.72% 99.73% 99.74%
2.8 99.74% 99.75% 99.76% 99.77% 99.77% 99.78% 99.79% 99.80% 99.80% 99.81%
2.9 99.81% 99.82% 99.83% 99.83% 99.84% 99.84% 99.85% 99.85% 99.86% 99.86%
3.0 99.87% 99.87% 99.87% 99.88% 99.88% 99.89% 99.89% 99.89% 99.90% 99.90%

 

 
 

 
Avisos legais e isenção de responsabilidades

 
Todas as informações contidas aqui e produzidas pelo sistema EBMcalc são fornecidas apenas com propósitos educacionais. Estas informações não devem ser usadas para diagnóstico ou tratamento de quaisquer problemas de saúde ou doenças. ESTAS INFORMAÇÕES NÃO DEVEM SUBSTITUIR O JULGAMENTO CLÍNICO OU ORIENTAR DE ALGUMA FORMA O TRATAMENTO INDIVIDUAL DOS PACIENTES. Clique aqui para ver a íntegra dos avisos legais e isenção de responsabilidades.
 
EBMcalc is Copyright © 1998-2022 Foundation Internet Services    [Build 267312 v22.3]