cliot (version 1.0.0)

eular_acr_pmr_calc: 2012 EULAR/ACR Classification Criteria for Polymyalgia Rheumatica

Description

Calculates the classification score for Polymyalgia Rheumatica (PMR) based on the 2012 EULAR/ACR provisional criteria. The algorithm applies to patients >= 50 years old presenting with new bilateral shoulder pain and elevated CRP/ESR.

The function supports both the Clinical Criteria (Score >= 4 classifies as PMR) and the Clinical + Ultrasound Criteria (Score >= 5 classifies as PMR).

Usage

eular_acr_pmr_calc(age, stiffness_gt_45, hip_pain_limited_rom,
                   neg_serology, no_peripheral_pain, use_ultrasound = FALSE,
                   us_abn_shoulder_and_hip = 0, us_abn_both_shoulders = 0)

Value

A list containing the total score, the classification threshold used, and the final result ("Classified as PMR" or "Not Classified as PMR").

Arguments

age

Numeric or String. Patient age in years. Must be >= 50 to proceed.

stiffness_gt_45

Numeric or String (0 or 1). Morning stiffness duration > 45 minutes. 1 = Yes, 0 = No. (+2 points).

hip_pain_limited_rom

Numeric or String (0 or 1). Hip pain or limited range of motion. 1 = Yes, 0 = No. (+1 point).

neg_serology

Numeric or String (0 or 1). Negative RF and ACPA. 1 = Yes, 0 = No. (+2 points).

no_peripheral_pain

Numeric or String (0 or 1). Absence of other joint pain. 1 = Yes, 0 = No. (+1 point).

use_ultrasound

Logical. Set to TRUE to include ultrasound criteria in the scoring algorithm. Defaults to FALSE.

us_abn_shoulder_and_hip

Numeric or String (0 or 1). At least 1 shoulder with subdeltoid bursitis/biceps tenosynovitis/glenohumeral synovitis AND at least 1 hip with synovitis/trochanteric bursitis. (+1 point).

us_abn_both_shoulders

Numeric or String (0 or 1). Both shoulders with subdeltoid bursitis, biceps tenosynovitis, or glenohumeral synovitis. (+1 point).

References

Dasgupta B, Cimmino MA, Maradit-Kremers H, et al. 2012 provisional classification criteria for polymyalgia rheumatica: a European League Against Rheumatism/American College of Rheumatology collaborative initiative. Ann Rheum Dis. 2012;71(4):484-492. doi:10.1136/annrheumdis-2011-200329

Examples

# Clinical criteria only: Patient with stiffness and negative serology
eular_acr_pmr_calc(age = 65, stiffness_gt_45 = 1, hip_pain_limited_rom = 0,
                   neg_serology = 1, no_peripheral_pain = 0)

# Clinical + Ultrasound criteria
eular_acr_pmr_calc(age = 70, stiffness_gt_45 = 1, hip_pain_limited_rom = 1,
                   neg_serology = 0, no_peripheral_pain = 0,
                   use_ultrasound = TRUE, us_abn_both_shoulders = 1)