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Table 1 Sample Characteristics

From: Longitudinal measurement invariance of the patient health questionnaire in a German sample

 

Total sample

Intervention group

Control group

 

N

Sex (f)

Mean age (SD)

PHQ-8

N

Sex (f)

Mean age (SD)

PHQ-8

N

Sex (f)

Mean age (SD)

PHQ-8

Baseline

588

61.7%

39.3 (14.0)

13.9 (3.8)

291

65.6%

39.7 (14.0)

13.9 (3.8)

297

57.9%

38.9 (14.1)

13.8 (3.8)

2-months

246

65.0%

40.2 (13.9)

9.9 (5.0)

246

65.0%

40.2 (13.9)

9.9 (5.0)

–

–

–

–

4-months

225

62.7%

40.6 (13.8)

9.9 (5.1)

225

62.7%

40.6 (13.8)

9.9 (5.1)

–

–

–

–

6-months

437

60.2%

40.4 (14.0)

10.4 (5.2)

215

62.8%

40.4 (13.9)

10.4 (5.3)

222

57.7%

40.3 (14.1)

10.5 (5.1)

12-months

447

59.7%

40.4 (13.9)

10.2 (5.4)

220

62.7%

40.3 (13.8)

10.7 (5.5)

227

56.8%

40.5 (13.9)

9.8 (5.3)

  1. Note. PHQ-8: sum score of the Patient-Healthcare Questionnaire-8 (standard deviation)