Treatment for Osteoarthritis

Keywords: repeated measures analysis of variance

Description

Osteoarthritis is a mechanical degeneration of joint surfaces causing pain, swelling and loss of joint function in one or more joints. Physiotherapists treat the affected joints to reduce pain (VAS = visual analogue scale) and to increase the range of movement (ROM). In this study there were 10 subjects, each of whom was treated with continuous TENS (electric nerve stimulation) and short wave diathermy. Measurements were taken also after no treatment.


	Variable		Description

	Subject		Subject identifier
	NoROM		ROM after no treatment
	NoVAS		VAS after no treatment
	TENSROM		ROM after continuous TENS
	TENSVAS		VAS after continuous TENS
	SWDROM		ROM after short wave diathermy
	SWDVAS		VAS after short wave diathermy

Download

Data file (tab-delimited text)

Source

Data supplied by Pat Roche, Department of Physiotherapy, University of Queensland.

Analysis

Effects coding used for categorical variables in model.

Categorical values encountered during processing are:
SUBJECT (10 levels)
          1,        2,        3,        4,        5,        6,        7,
          8,        9,       10
TREATMENT$ (3 levels)
   Diathermy, None, TENS

Dep Var: ROM   N: 30   Multiple R: 0.874   Squared multiple R: 0.764


                             Analysis of Variance

Source             Sum-of-Squares   df  Mean-Square     F-ratio       P

SUBJECT                15720.967     9     1746.774       5.789       0.001
TREATMENT$              1844.467     2      922.233       3.056       0.072

Error                   5431.533    18      301.752