Wolfe F, Michaud K, Pincus T. A composite disease activity scale for clinical practice, observational studies, and clinical trials: the patient activity scale (PAS/PAS-II). J Rheumatol. 2005;32(12):2410-5.

Anderson J, Caplan L, Yazdany J, et al. Rheumatoid arthritis disease activity measures: American College of Rheumatology recommendations for use in clinical practice. Arthritis Care Res (Hoboken). 2012;64(5):640-7.

Dr. Frederick Wolfe

//outputs
var calc_output = [];

//user inputs
var haq1 = parseFloat(haq1);
var haq2 = parseFloat(haq2);
var haq3 = parseFloat(haq3);
var haq4 = parseFloat(haq4);
var haq5 = parseFloat(haq5);
var haq6 = parseFloat(haq6);
var haq7 = parseFloat(haq7);
var haq8 = parseFloat(haq8);
var haq9 = parseFloat(haq9);
var haq10 = parseFloat(haq10);
var haq11 = parseFloat(haq11);
var haq12 = parseFloat(haq12);
var haq13 = parseFloat(haq13);
var haq14 = parseFloat(haq14);
var haq15 = parseFloat(haq15);
var haq16 = parseFloat(haq16);
var haq17 = parseFloat(haq17);
var haq18 = parseFloat(haq18);
var haq19 = parseFloat(haq19);
var haq20 = parseFloat(haq20);

var device1 = parseFloat(device1);
var device2 = parseFloat(device2);
var device3 = parseFloat(device3);
var device4 = parseFloat(device4);
var device5 = parseFloat(device5);
var device6 = parseFloat(device6);
var device7 = parseFloat(device7);

var help1 = parseFloat(help1);
var help2 = parseFloat(help2);
var help3 = parseFloat(help3);
var help4 = parseFloat(help4);
var help5 = parseFloat(help5);
var help6 = parseFloat(help6);
var help7 = parseFloat(help7);
var help8 = parseFloat(help8);

var dressing = Math.max(haq1, haq2);
var arising = Math.max(haq3, haq4);
var eating = Math.max(haq5, haq6, haq7);
var walking = Math.max(haq8, haq9);
var hygiene = Math.max(haq10, haq11, haq12);
var reach = Math.max(haq13, haq14);
var grip = Math.max(haq15, haq16, haq17);
var activities = Math.max(haq18, haq19, haq20);

if (dressing < 2) {
  if (device1 > 0 || help1 > 0) {
    dressing = 2;
  }
}
if (arising < 2) {
  if (device2 > 0 || help2 > 0) {
    arising = 2;
  }
}
if (eating < 2) {
  if (device3 > 0 || help3 > 0) {
    eating = 2;
  }
}
if (walking < 2) {
  if (device4 > 0 || help4 > 0) {
    walking = 2;
  }
}
if (hygiene < 2) {
  if (device5 > 0 || help5 > 0) {
    hygiene = 2;
  }
}
if (reach < 2) {
  if (device6 > 0 || help6 > 0) {
    reach = 2;
  }
  }  
if (grip < 2) {
  if (device7 > 0 || help7 > 0) {
    grip = 2;
  }
}
if (activities < 2) {
  if (help8 > 0) {
    activities = 2;
  }
}

var haq = dressing + arising + eating + walking + hygiene + reach + grip + activities;
haq = haq/8;

var pain = parseFloat(pain);
var global = parseFloat(global);
var risk;
var msg;

//final score
var score = (haq*3.33) + pain + global;
score = score/3;
score = score.toFixed(2);
  
//disease activity
if (score <= 0.25 && score >= 0){
  risk = 'Remission';
    msg = risk;
} else if (score <= 3.70 && score >= 0.26){
  risk = 'Low/minimal';
    msg = risk + " disease activity";
} else if (score <= 7.99 && score >= 3.71){
  risk = 'Moderate';
    msg = risk + " disease activity";
} else{
  risk = 'High/severe';
    msg = risk + " disease activity";
}

//result for user 
calc_output.push({
  name: 'mini',
  value: score,
  value_text: 'points',
  message: msg
});
calc_output.push({
  name: 'group',
  value: score,
  value_text: 'points',
  message: 'PAS'
});
calc_output.push({
  name: 'ppf',
  value: risk,
  value_text: '',
  message: 'Disease activity<br/><br/><guideline id = "10123">ACR guideline</guideline>'
});


Patient Activity Scale (PAS) for RA

haq1

haq2

haq3

haq4

haq5

haq6

haq7

haq8

haq9

haq10

haq11

haq12

haq13

haq14

haq15

haq16

haq17

haq18

haq19

haq20

device1

device2

device3

device4

device5

device6

device7

help1

help2

help3

help4

help5

help6

help7

help8

pain

global

<p>Quantifies severity of rheumatoid arthritis (RA) using patient-reported symptoms.</p>

Patient Activity Scale for RA

The Patient Activity Scale (PAS) for RA quantifies severity of rheumatoid arthritis (RA) using patient-reported symptoms.

Patient Activity Scale II for RA

DAS28-ESR for Rheumatoid Arthritis

DAS28-CRP for Rheumatoid Arthritis

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Listen to the VACO co-creators break down how to use VACO\, what it does\, and what it doesn’t.

Calc Function