Blood Pressure Percentiles for Boys (2 - 17 years)

Input

 Age mo yr Height cm in m Systolic BP cmHg mmHg Diastolic BP cmHg mmHg

Results

 Height Percentile Systolic BP Percentile Diastolic BP Percentile Threshold for Stage II hypertension* (defined as 99th percentile plus 5 mmHg) SBP Threshold DBP Threshold

 Systolic BP Percentile Interpretation

 Percentile < 90: Normal Systolic Blood Pressure Percentile >= 90 and < 95: Prehypertensive Systolic Blood Pressure Percentile >= 95: Hypertensive Systolic Blood Pressure

 Diastolic BP Percentile Interpretation

 Percentile < 90: Normal Diastolic Blood Pressure Percentile >= 90 and < 95: Prehypertensive Diastolic Blood Pressure Percentile >= 95: Hypertensive Diastolic Blood Pressure

Notes
• In this calculator, the subject's blood pressure percentiles are based on age and height percentile.
• Stage I hypertension is defined as either Systolic BP or Diastolic BP between the 95th percentile and the 99th percentile plus 5 mmHg.
• Stage II hypertension is defined as either Systolic BP or Diastolic BP greater than the 99th percentile plus 5 mmHg.
• Children and adolescents whose BP exceeds 120/80 mmHg are also considered prehypertensive.
• At the extremes (>97th percentile or <3rd percentile), small differences in percentiles represent clinically important differences. At these extremes, the Z-score is a more precise reflection of how far the measurement deviates from the mean and is a useful tool for tracking changes.
• LMS data used in this calculator are shown in the data table below.
• For all LMS tables, the row in the table corresponding to the patient-specific value is found in the first column of the table; values to be used for L (the Box-Cox power), M (the median), and S (the generalized coefficient of variation) in the equation for Z-score are retrieved.
• Z-scores may be used to do a table lookup for the corresponding percentile in the Normal table percentiles for Z-score table (below). Numbers along the left side (Y-axis) of the table represent the first number and first decimal place of the Z-score, while the numbers along the top (X-axis) of the table represent the second decimal position of the Z-score.

Equations used

 AgeMonths = Age * 12 HeightZ = ((Height/M)L - 1) / (L * S) HeightPercentile = ZtoPercentile(HeightZ) AgeFactor = Age - 10 SystolicBPAvg = 102.19768 + (1.82416 * AgeFactor) + (0.12776 * AgeFactor2) + (0.00249 * AgeFactor3) - (0.00135 * AgeFactor4) + (2.73157 * HeightZ) - (0.19618 * HeightZ2) - (0.04659 * HeightZ3) + (0.00947 * HeightZ4) DiastolicBPAvg = 61.01217 + (0.68314 * AgeFactor) - (0.09835 * AgeFactor2) + (0.01711 * AgeFactor3) + (0.00045 * AgeFactor4) + (1.46993 * HeightZ) - (0.07849 * HeightZ2) - (0.03144 * HeightZ3) + (0.00967 * HeightZ4) SystolicBPZ = (SystolicBP - SystolicBPAvg) / 10.7128 DiastolicBPZ = (DiastolicBP - DiastolicBPAvg) / 11.6032 SystolicBPPercentile = ZtoPercentile(SystolicBPZ) DiastolicBPPercentile = ZtoPercentile(DiastolicBPZ) SBPThreshold = (2.326348 * 10.7128) + SystolicBPAvg + 5 DBPThreshold = (2.326348 * 11.6032) + DiastolicBPAvg + 5

References
1. National High Blood Pressure Education Program Working Group on High Blood Pressure in Children and Adolescents. The fourth report on the diagnosis, evaluation, and treatment of high blood pressure in children and adolescents. Pediatrics. 2004 Aug;114(2 Suppl 4th Report):555-76. PubMed ID: 15286277
2. LMS Parameters for Boys: Height for Age. National health and nutrition survey (NHANES), CDC/National Center for Health Statistics.

 LMS Parameters for Boys: Height for Age

 Age [months] Power [L] Median [M] Variation [S] 24.5 1.00720807 86.86160934 0.040395626 25.5 0.837251351 87.65247282 0.040577525 26.5 0.681492975 88.42326434 0.040723122 27.5 0.538779654 89.17549228 0.040833194 28.5 0.407697153 89.91040853 0.040909059 29.5 0.286762453 90.62907762 0.040952433 30.5 0.174489485 91.33242379 0.04096533 31.5 0.069444521 92.02127167 0.040949976 32.5 -0.029720564 92.69637946 0.040908737 33.5 -0.124251789 93.35846546 0.040844062 34.5 -0.215288396 94.00822923 0.040758431 35.5 -0.30385434 94.64636981 0.040654312 36.5 -0.390918369 95.27359106 0.04053412 37.5 -0.254801167 95.91474929 0.040572876 38.5 -0.125654535 96.54734328 0.04061691 39.5 -0.00316735 97.17191309 0.040666414 40.5 0.11291221 97.78897727 0.040721467 41.5 0.222754969 98.3990283 0.040782045 42.5 0.326530126 99.00254338 0.040848042 43.5 0.42436156 99.599977 0.040919281 44.5 0.516353108 100.191764 0.040995524 45.5 0.602595306 100.7783198 0.041076485 46.5 0.683170764 101.3600411 0.041161838 47.5 0.758158406 101.9373058 0.041251224 48.5 0.827636736 102.5104735 0.041344257 49.5 0.891686306 103.0798852 0.041440534 50.5 0.95039153 103.645864 0.041539635 51.5 1.003830006 104.208713 0.041641136 52.5 1.05213569 104.7687256 0.041744602 53.5 1.0953669 105.3261638 0.041849607 54.5 1.133652119 105.8812823 0.041955723 55.5 1.167104213 106.4343146 0.042062532 56.5 1.195845353 106.9854769 0.042169628 57.5 1.220004233 107.534968 0.042276619 58.5 1.239715856 108.0829695 0.042383129 59.5 1.255121285 108.6296457 0.042488804 60.5 1.266367398 109.1751441 0.042593311 61.5 1.273606657 109.7195954 0.042696342 62.5 1.276996893 110.2631136 0.042797615 63.5 1.276701119 110.8057967 0.042896877 64.5 1.272887366 111.3477265 0.042993904 65.5 1.265728536 111.8889694 0.043088503 66.5 1.255402281 112.4295761 0.043180513 67.5 1.242090871 112.9695827 0.043269806 68.5 1.225981067 113.5090108 0.043356287 69.5 1.207263978 114.0478678 0.043439893 70.5 1.186140222 114.5861486 0.043520597 71.5 1.162796198 115.1238315 0.043598407 72.5 1.137442868 115.6608862 0.043673359 73.5 1.110286487 116.1972691 0.043745523 74.5 1.081536236 116.732925 0.043815003 75.5 1.05140374 117.2677879 0.043881929 76.5 1.020102497 117.8017819 0.043946461 77.5 0.987847213 118.3348215 0.044008785 78.5 0.954853043 118.8668123 0.044069112 79.5 0.921334742 119.397652 0.044127675 80.5 0.887505723 119.9272309 0.044184725 81.5 0.85357703 120.455433 0.044240532 82.5 0.819756239 120.9821362 0.044295379 83.5 0.786246296 121.5072136 0.044349559 84.5 0.753244292 122.0305342 0.044403374 85.5 0.720940222 122.5519634 0.04445713 86.5 0.689515708 123.0713645 0.044511135 87.5 0.659142731 123.588599 0.044565693 88.5 0.629997853 124.1035312 0.044621104 89.5 0.602203984 124.6160161 0.044677662 90.5 0.575908038 125.1259182 0.044735646 91.5 0.55123134 125.6331012 0.044795322 92.5 0.528279901 126.1374319 0.044856941 93.5 0.507143576 126.6387804 0.04492073 94.5 0.487895344 127.1370217 0.044986899 95.5 0.470590753 127.6320362 0.045055632 96.5 0.455267507 128.1237104 0.045127088 97.5 0.441945241 128.6119383 0.045201399 98.5 0.430625458 129.096622 0.045278671 99.5 0.421291648 129.5776723 0.045358979 100.5 0.413909588 130.0550101 0.045442372 101.5 0.408427813 130.5285669 0.045528869 102.5 0.404778262 130.9982857 0.045618459 103.5 0.402877077 131.4641218 0.045711105 104.5 0.402625561 131.9260439 0.045806742 105.5 0.40391127 132.3840348 0.045905281 106.5 0.406609232 132.838092 0.046006604 107.5 0.410583274 133.2882291 0.046110573 108.5 0.415687443 133.7344759 0.046217028 109.5 0.421767514 134.1768801 0.04632579 110.5 0.428662551 134.6155076 0.046436662 111.5 0.436206531 135.0504433 0.04654943 112.5 0.44423 135.4817925 0.046663871 113.5 0.45256176 135.9096813 0.046779748 114.5 0.461030578 136.3342577 0.046896817 115.5 0.469466904 136.7556923 0.047014827 116.5 0.477704608 137.1741794 0.047133525 117.5 0.48558272 137.5899378 0.047252654 118.5 0.492947182 138.0032114 0.047371961 119.5 0.499652617 138.4142703 0.047491194 120.5 0.505564115 138.8234114 0.047610108 121.5 0.510559047 139.2309592 0.047728463 122.5 0.514528903 139.6372663 0.04784603 123.5 0.517381177 140.042714 0.047962592 124.5 0.519041285 140.4477127 0.048077942 125.5 0.519454524 140.8527022 0.048191889 126.5 0.518588072 141.2581515 0.048304259 127.5 0.516433004 141.6645592 0.048414893 128.5 0.513006312 142.072452 0.048523648 129.5 0.508352901 142.4823852 0.048630402 130.5 0.502547502 142.8949403 0.04873505 131.5 0.495696454 143.3107241 0.048837504 132.5 0.487939275 143.7303663 0.048937694 133.5 0.479449924 144.1545167 0.049035564 134.5 0.470437652 144.5838414 0.049131073 135.5 0.461147305 145.0190192 0.049224189 136.5 0.451858946 145.4607359 0.049314887 137.5 0.442886661 145.9096784 0.049403145 138.5 0.434576385 146.3665278 0.049488934 139.5 0.427302633 146.8319513 0.049572216 140.5 0.421464027 147.3065929 0.049652935 141.5 0.417477538 147.7910635 0.049731004 142.5 0.415771438 148.2859294 0.0498063 143.5 0.416777012 148.7917006 0.04987865 144.5 0.420919142 149.3088178 0.049947823 145.5 0.428606007 149.8376391 0.050013518 146.5 0.440218167 150.3784267 0.050075353 147.5 0.456097443 150.9313331 0.050132858 148.5 0.476536014 151.4963887 0.050185471 149.5 0.501766234 152.0734897 0.050232532 150.5 0.531951655 152.6623878 0.050273285 151.5 0.567179725 153.2626819 0.050306885 152.5 0.607456565 153.8738124 0.050332406 153.5 0.652704121 154.495058 0.05034886 154.5 0.702759868 155.1255365 0.050355216 155.5 0.757379106 155.7642086 0.050350423 156.5 0.816239713 156.4098858 0.050333444 157.5 0.878947416 157.0612415 0.050303283 158.5 0.945053486 157.7168289 0.050259018 159.5 1.014046108 158.3750929 0.050199837 160.5 1.085383319 159.034399 0.050125062 161.5 1.158487278 159.6930501 0.05003418 162.5 1.232768816 160.3493168 0.049926861 163.5 1.307628899 161.0014586 0.049802977 164.5 1.382473225 161.6477515 0.04966261 165.5 1.456720479 162.2865119 0.049506051 166.5 1.529810247 162.9161202 0.049333801 167.5 1.601219573 163.535045 0.049146553 168.5 1.670433444 164.1418486 0.04894519 169.5 1.736995571 164.7352199 0.048730749 170.5 1.800483802 165.3139755 0.048504404 171.5 1.860518777 165.8770715 0.048267442 172.5 1.916765525 166.4236087 0.04802123 173.5 1.968934444 166.9528354 0.047767192 174.5 2.016781776 167.4641466 0.047506783 175.5 2.060109658 167.9570814 0.047241456 176.5 2.098765817 168.4313175 0.04697265 177.5 2.132642948 168.8866644 0.046701759 178.5 2.16167779 169.3230548 0.046430122 179.5 2.185849904 169.7405351 0.046159004 180.5 2.205180153 170.139255 0.045889585 181.5 2.219728869 170.5194567 0.045622955 182.5 2.2295937 170.881464 0.045360101 183.5 2.234907144 171.2256717 0.045101913 184.5 2.235833767 171.5525345 0.044849174 185.5 2.232567138 171.8625576 0.044602566 186.5 2.2253265 172.1562865 0.044362674 187.5 2.214353232 172.4342983 0.044129985 188.5 2.199905902 172.6971935 0.043904897 189.5 2.182262864 172.9455898 0.043687723 190.5 2.161704969 173.180112 0.043478698 191.5 2.138524662 173.4013896 0.043277987 192.5 2.113023423 173.6100518 0.043085685 193.5 2.085490286 173.8067179 0.042901835 194.5 2.0562195 173.9919998 0.042726424 195.5 2.025496648 174.1664951 0.042559396 196.5 1.993598182 174.3307855 0.042400652 197.5 1.960789092 174.4854344 0.042250063 198.5 1.927320937 174.6309856 0.042107465 199.5 1.89343024 174.7679617 0.041972676 200.5 1.859337259 174.8968634 0.041845488 201.5 1.825245107 175.0181691 0.041725679 202.5 1.791339209 175.1323345 0.041613015 203.5 1.757787065 175.2397926 0.041507249 204.5 1.724738292 175.340954 0.041408129 205.5 1.692324905 175.4362071 0.041315398 206.5 1.660661815 175.5259191 0.041228796 207.5 1.629847495 175.6104358 0.04114806 208.5 1.599964788 175.690083 0.041072931 209.5 1.571081817 175.7651671 0.04100315 210.5 1.543252982 175.8359757 0.040938463 211.5 1.516519998 175.9027788 0.040878617 212.5 1.490912963 175.9658293 0.040823368 213.5 1.466451429 176.0253641 0.040772475 214.5 1.44314546 176.081605 0.040725706 215.5 1.420996665 176.1347593 0.040682834 216.5 1.399999187 176.1850208 0.04064364 217.5 1.380140651 176.2325707 0.040607913 218.5 1.361403047 176.2775781 0.040575448 219.5 1.343763564 176.3202008 0.040546051 220.5 1.327195355 176.3605864 0.040519532 221.5 1.311668242 176.3988725 0.040495713 222.5 1.297149359 176.4351874 0.040474421 223.5 1.283603728 176.469651 0.040455493 224.5 1.270994782 176.5023751 0.040438773 225.5 1.25928483 176.533464 0.040424111 226.5 1.248435461 176.5630153 0.040411366 227.5 1.23840791 176.5911197 0.040400405 228.5 1.229163362 176.6178621 0.040391101 229.5 1.220663228 176.6433219 0.040383334 230.5 1.212869374 176.6675729 0.04037699 231.5 1.20574431 176.6906844 0.040371962 232.5 1.199251356 176.712721 0.040368149 233.5 1.19335477 176.733743 0.040365456 234.5 1.188019859 176.753807 0.040363795 235.5 1.183213059 176.7729657 0.04036308 236.5 1.178901998 176.7912687 0.040363233 237.5 1.175055543 176.8087622 0.040364179 238.5 1.171643828 176.8254895 0.04036585 239.5 1.16863827 176.8414914 0.04036818

 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%

 Legal Notices and Disclaimer All information contained in and produced by the EBMcalc system is provided for educational purposes only. This information should not be used for the diagnosis or treatment of any health problem or disease. THIS INFORMATION IS NOT INTENDED TO REPLACE CLINICAL JUDGMENT OR GUIDE INDIVIDUAL PATIENT CARE IN ANY MANNER. Click here for full notice and disclaimer. EBMcalc is Copyright © 1998-2022 Foundation Internet Services    [Build 267312 v22.3]