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Table 10 Kendall’s tau (τ) correlations between IPQ-O sub-scales and other continuous scales to assess construct validity

From: Testing the psychometric properties of the illness perceptions questionnaire for OCD (IPQ-O)

IPQ-O sub-scale

 

OCD severity (Y-BOCS total)

OCD severity (Y-BOCS obsession total)

OCD severity (Y-BOCS compulsion total)

Depression (PHQ-9 total)

Anxiety (GAD total)

Attitudes towards seeking mental health services – Openness (IASMHS)

Attitudes towards seeking mental health services - Help seeking propensity (IASMHS)

Attitudes towards seeking mental health services - Indifference stigma (IASMHS)

Functioning (WSASa)

1 Identity

Ï„

.15**

.18**

.11*

.15**

.22**

.08

−.02

0

.110

N

234

237

237

230

228

224

226

224

110

2.Consequences

Ï„

.45**

.43**

.41**

.39**

.39**

−.09*

−.18**

−.27**

.47**

N

292

296

294

280

278

272

277

275

137

3.Control

Ï„

−.38**

−.32**

−.37**

−.29**

−.24**

.08

.32**

.17**

−.26**

N

289

293

291

277

276

272

274

272

139

4.Permanence

Ï„

.23**

.18**

.24**

.21**

.24**

−.02

−.12**

−.13**

.09

N

300

304

303

288

288

280

285

283

140

5.Coherence

Ï„

−.16**

−.13**

−.15**

−.15**

−.12**

.18**

.08

.24**

−.11

N

302

305

305

288

289

282

287

284

140

6.Reactivity

Ï„

−.03

−.01

−.05

.07

.11*

.00

.04

−.04

.07

N

294

298

297

283

283

275

280

279

141

7.Spectrum

Ï„

−.13**

−.12**

−.13**

−.14**

−.13**

−.06

.16**

.01

−.16**

N

307

311

310

294

295

287

291

289

145

8.Emotional representation

Ï„

.37**

.38**

.33**

.29**

.38**

−.07

−.08

−.20**

.29**

N

301

305

303

288

288

282

288

284

142

9.Environmental stress attributions

Ï„

.09*

.12**

.07

.13**

.13**

−.03

.09*

−.09*

.17**

N

301

305

304

289

288

282

286

284

145

10.Biological attributions

Ï„

.05

.05

.04

.06

.07

.02

.05

−.05

.06

N

305

309

308

292

292

285

289

287

145

11.Learned behaviour attributions

Ï„

−.07

−.03

−.09*

−.03

−.06

.01

.10*

−.07

.03

N

308

312

311

295

295

288

292

290

146

12.Own characteristics or behaviour attributions

Ï„

.06

.06

.05

.16**

.12**

−.13**

.03

−.08

.03

N

303

307

306

290

290

284

288

286

143

  1. ** P < 0.01 (2-tailed) * P < 0.05 level (2-tailed)
  2. aNs for the WSAS scale are smaller than other measures due to error in how the WSAS scale was displayed to early completers of the online measure. Only participants taking part after the online questionnaire error was corrected are included for this scale
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BMC Psychiatry

ISSN: 1471-244X

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