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Table 1 Comparison of respondents and non-respondents

From: A longitudinal study of mental health before and during COVID-19 lockdown in the French population

 

Respondents

Non-respondents

 
 

n = 1237

n = 7686

 

n

%

n

%

p-value

Gender (n = 8923)

0.7

 Male

601

48.6

3688

48.0

 

 Female

636

51.4

3998

52.0

 

Age (n = 8923)

Mean

61.8

SD

12.7

Mean

58.9

SD

14.4

< 10−4

Marital status (n = 7044)

0.4

 As a couple (marriage. Civil union. Cohabitation with a spouse/partner)

852

71.4

4161

71.1

 

 Divorced or separated

143

12.0

779

13.3

 

 Widowed

50

4.2

199

3.4

 

 Single

145

12.1

688

11.8

 

 Other

3

0.3

24

0.4

 

Highest education obtained (n = 7053)

< 10−4

 Less than General Baccalaureate

288

24.1

1781

30.4

 

 General Baccalaureate or Diploma level BAC + 2

329

27.6

1646

28.1

 

 Diploma level BAC + 3 or higher

576

48.3

2433

41.5

 

Monthly household income (n = 6610)

< 10− 4

 Less than €2500

280

27.3

1889

33.8

 

 From 2500 to less than 4167 €.

376

36.6

2182

39.1

 

 €4167 and more

370

36.1

1513

27.1

 

Place of residence (n = 7135)

< 10−3

 Rural area (municipality with less than 5000 inhabitants)

392

35.3

2470

41.0

 

 Municipality with 5000 to 30,000 inhabitants

334

30.1

1759

29.2

 

 Municipality of more than 30,000 inhabitants

385

34.6

1795

29.8

 

Housing type (n = 7288)

0.78

 Detached house

781

69.7

4271

69.3

 

 Apartment

340

30.3

1896

30.7

 

Number of rooms in the dwelling (n = 7274)

< 0.05

 One to four rooms

239

21.4

1494

24.3

 

 Five or six rooms

437

39.0

2439

39.6

 

 Seven or more rooms

443

39.6

2222

36.1

 

Size of living space (in m2) (n = 7202)

Mean113.1

SD 49.3

Mean 112.4

SD 54.4

0.64

Personal outdoor space (garden. Land. courtyard. ...) (n = 6980)

0.11

 No

272

25.1

1620

27.5

 

 Yes

812

74.9

4276

72.5

 

Tobacco consumption at recruitment (n = 6071)

< 10−4

 Smoker

108

9.4

782

15.9

 

 Ex-smoker

285

24.9

1064

21.6

 

 Non-smoker

752

65.7

3080

62.5

 

Frequency of alcohol consumption at recruitment (n = 6088)

< 10−3

 Never

97

8.5

532

10.8

 

 Once a month or less often

179

15.6

904

18.3

 

 2 to 4 times a month

346

30.2

1458

29.5

 

 2 to 3 times a week

216

18.8

977

19.8

 

 4 times a week or more often

309

26.9

1070

21.6

 

Frequency of holidays (n = 6428)

< 10−2

 Two or more times a year

567

49.1

2307

43.7

 

 Once or twice a year

391

33.8

1806

34.3

 

 Only once in two years

91

7.9

509

9.6

 

 Only a few weekend outings

55

4.8

362

6.9

 

 Never

51

4.4

289

5.5

 

Regular activities

 With a screen (n = 6475)

1108

95.7

4937

92.8

< 10−3

 Reading (n = 6470)

1001

86.7

4262

80.2

< 10−4

 Indoor activities (n = 6446)

238

20.8

1092

20.6

0.89

 Outdoor activities (n = 6432)

67

5.9

451

8.5

< 10−2

 Gardening (n = 6455)

649

56.5

2907

54.8

0.31

 DIY (n = 6450)

570

49.7

2562

48.3

0.41

 Going out (n = 6460)

752

65.3

3189

60.1

< 10−3

 Manual activities (n = 6440)

199

17.4

846

16.0

0.25

 Sporting activities (n = 6470)

932

80.8

3970

74.7

< 10−4

Self-perceived mental health status (n = 6271)

< 10−2

 1 to 7

420

36.6

2112

41.2

 

 8

301

26.2

1306

25.5

 

 9 to 10

428

37.2

1704

33.3

 

 Mean (SD)

7.75

(1.7)

7.54

(1.8)

< 10−3

Self-perceived physical health status (n = 6269)

< 0.05

 1 to 7

500

43.6

2479

48.4

 

 (8

354

30.8

1437

28.1

 

 9 to 10

294

25.6

1205

23.5

 

 Mean (SD)

7.44

(1.7)

7.24

(1.7)

< 10−3

Anxiety symptoms GAD-7 score (n = 5467)

10−3

  ≤ 4

860

82.7

3442

77.8

 

  > 4

180

17.3

985

22.2

 

Depression symptoms PHQ-9 score (n = 5356)

< 10−2

  ≤ 4

752

73.0

2934

67.8

 

  > 4

278

27.0

1392

32.2