cliot (version 1.0.0)

patient_activity_scale_ii: Patient Activity Scale-II (PAS-II) for Rheumatoid Arthritis

Description

Calculates the Patient Activity Scale-II (PAS-II), a patient-reported outcome measure for Rheumatoid Arthritis disease activity. It combines Pain VAS, Patient Global Assessment VAS, and the HAQ-II functional score into a single 0-10 scale.

Usage

patient_activity_scale_ii(pain_vas, patient_global_vas, haq_ii_items)

Value

A list containing:

PAS_II_Score

The calculated score (Range 0-10).

Disease_Activity

Classification (Remission <= 0.25, Low <= 3.7, Moderate < 8.0, High >= 8.0).

Components

The individual weighted components used in the calculation.

Arguments

pain_vas

Numeric (0-10). Patient's assessment of pain on a 10 cm visual analog scale.

patient_global_vas

Numeric (0-10). Patient's global assessment of disease activity on a 10 cm visual analog scale.

haq_ii_items

Numeric vector of length 10. Scores for the 10 HAQ-II items (0=No difficulty, 1=Some difficulty, 2=Much difficulty, 3=Unable to do). Items cover: Standing up, Walking outdoors, Walking up steps, Washing, Reaching, Opening car door, Yard work, Waiting in line, Lifting heavy objects, Moving heavy objects.

References

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):640-647. doi:10.1002/acr.21649

Examples

# Example 1: High Activity
# Pain 8, Global 9, HAQ-II mixed difficulty
haq_high <- c(2, 2, 3, 1, 3, 2, 3, 1, 3, 2)
patient_activity_scale_ii(8, 9, haq_high)

# Example 2: Low Activity
# Pain 2, Global 1, HAQ-II no difficulty
haq_low <- rep(0, 10)
patient_activity_scale_ii(2, 1, haq_low)