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Table 1 Baseline characteristics of different analysis populations

From: Validity of single item responses to short message service texts to monitor depression: an mHealth sub-study of the UK ACUDep trial

Characteristic

Total patients in ACUDep trial n = 755

Group 1 Patients with PHQ-9 score at 3 months n = 602

Group 2 Patients with PHQ-9 score at 3 months & R-SMS-DS at 3 months (any time) n = 337

Group 3 Patients with PHQ-9 score at 3 months & R-SMS-DS at 3 months (±6 days) n = 213

Age

    

Mean (SD)

43.5 (13.37)

44.7 (13.14)

42.2 (11.13)

42.5 (11.18)

Median (min, max)

43 (18, 93)

43.5 (18, 89)

42 (18, 75)

42 (18, 75)

Gender, n (%)

    

 Male

201 (26.6)

159 (26.4)

86 (25.5)

50 (23.5)

 Female

554 (73.4)

443 (73.6)

251 (74.5)

163 (76.5)

Employment, n (%)

    

 Working full-time

281 (37.2)

223 (37.0)

140 (41.5)

80 (37.6)

 Working part-time

144 (19.1)

116 (19.3)

63 (18.7)

47 (22.1)

 Unable to work

95 (12.6)

69 (11.5)

36 (10.7)

20 (9.4)

 Looking after home

83 (11.0)

62 (10.3)

37 (11.0)

25 (11.7)

 Retired

65 (8.6)

61 (10.1)

15 (4.5)

10 (4.7)

 Full-time education

23 (3.0)

17 (2.8)

13 (3.9)

8 (3.8)

 Other

48 (6.4)

40 (6.6)

23 (6.8)

18 (8.5)

 Missing

16 (2.1)

14 (2.3)

10 (3.0)

5 (2.3)

Depression, mean (SD)

    

 Age at 1st major episode

25.2 (12.28)

25.6 (12.51)

23.8 (11.03)

24.9 (11.66)

 Baseline BDI-II

32.5 (8.72)

32.1 (8.62)

31.8 (8.54)

31.5 (8.27)

 Baseline PHQ-9

16.0 (5.29)

15.7 (5.32)

15.6 (5.48)

15.4 (5.29)