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Table 1 Characteristics of study participants in the discovery and replication cohorts

From: Epigenome-wide association study identifies DNA methylation markers for asthma remission in whole blood and nasal epithelium

 

Discovery cohort

Lifelines

EGEA

PersA (n = 49)

ClinR (n = 54)

ComR (n = 20)

PersA (n = 99)

ClinR (n = 25)

Healthy (n = 636)

PersA (n = 106)

ClinR (n = 15)

ComR (n = 3)

Characteristics at last visit

 Age at remission status, years

49.8 (48.5; 51.3)

50.5 (48.3; 57.6)

50.5 (48.4; 59.8)

46.9 (40.7;50.7)

43.2 (35.7;50.3)

46.3 (39.2;52.9)

52.6 (36.7; 61.4)

49.2 (36.7; 57.6)

30.5 (28.2; 59.1)

 Male, n (%)

31 (63.3%)

37 (68.5%)

15 (75.0%)

58 (58.6%)

10 (40.0%)

384 (60.4%)

49 (46.7%)

7 (46.7%)

1 (33.3%)

 Duration of follow-up, years

39 (38;40.5)

39 (37; 42)

39 (37;41)

   

11.3 (10.7; 12.1)

11.6 (10.7; 12.2)

11.6 (10.0; 12.7)

 Current-smoking, n (%)

4 (8.2%)

8 (14.8%)

2 (10.0%)

27 (27.3%)

14 (56.0%)

207 (32.5%)

10 (9.5%)

2 (13.3%)

1 (33.3%)

 Ex-smoking, n (%)

13 (26.5%)

18 (33.3%)

7 (35.0%)

0 (0.0%)

0 (0.0%)

0 (0.0%)

35 (33.3%)

5 (33.3%)

0

 Never-smoking, n (%)

32 (65.3%)

28 (51.9%)

11 (55.0%)

72 (72.7%)

11 (44.0%)

429 (67.5%)

60 (57.1%)

8 (53.3%)

2 (66.7%)

 ICS, n (%)

31 (63.3%)

0

0

48 (48.5%)

0 (0.0%)

0 (0.0%)

72 (70.6%)

0

0

 Allergic rhinitis, n (%)

33 (67.3%)

30 (55.6%)

9 (45.0%)

59 (59.6%)

13 (52.0%)

123 (19.3%)

70 (67.3%)

11 (73.3%)

2 (66.7%)

 BMI

25.7 (23.7; 28.5)

26.8 (23.7; 28.3)

26.0 (22.8; 28.6)

25.7 (22.9;28.0)

26.0 (23.7;29.6)

25.8 (23.6;28.1)

23.9 (22.4; 27.5)

22.5 (19.9; 28.0)

22.0 (19.9; 22.4)

 FEV1% pred

80.6 (71.1; 91.9)

90.2 (82.9; 104.7)

101.8 (85.9; 110.0)

81.2 (70.9;91.6)

87.1 (74.0;93.4)

101.5 (96.1;108.7)

87.0 (71.7; 98.4)

95.2 (87.5; 107.2)

97.5 (90.7; 121.5)

 FVC% pred

94.2 (88.4; 103.7)

101.7 (95.2; 111.5)

106.6 (101.2; 115.9)

94.1 (85.8;102.2)

100.3 (90.4;109.2)

104.0 (97.5;111.4)

98.5 (84.8; 108.9)

95.2 (86.9; 106.1)

96.3 (86.9; 119.2)

 FEV1/FVC

0.67 (0.60; 0.72)

0.72 (0.68; 0.75)

0.72 (0.68; 0.76)

0.67 (0.62;0.76)

0.67 (0.62;0.76)

0.79 (0.75;0.83)

0.69 (0.61; 0.77)

0.81 (0.78; 0.82)

0.80 (0.80; 0.91)

Characteristics at baseline

 Age, years

10.0 (9.0; 11.0)

11.0 (9.0; 17.5)

11.5 (9.8; 15.8)

   

40.6 (25.7; 48.7)

37.0 (26.0; 46.0)

18.9 (18.8; 46.4)

 FEV1% pred

76.6 (67.4; 84.0)

77.1 (67.5; 83.8)

78.1 (73.5; 83.7)

   

81.7 (66.2; 95.9)

90.6 (82.0; 103.0)

82.0 (80.1; 122.9)

 FVC% pred

88.8 (84.0; 96.1)

88,3 (80.9; 95.3)

88.9 (79.8; 96.5)

   

95.5 (83.7; 104.3)

86.4 (81.9; 100.6)

84.5 (70.1; 118.8)

 FEV1/FVC

0.73 (0.64; 0.78)

0.73 (0.66; 0.79)

0.77(0.66; 0.80)

   

0.70 (0.63; 0.80)

0.86 (0.82; 0.89)

0.86 (0.83; 0.96)

 Start asthma before age 16, n (%)

48 (98.0%)

50 (92.6%)

19 (95.0%)

59 (62.1%)

18 (81.8%)

 

52 (49.5%)

8 (53.3%)

2 (66.7%)

  1. Continuous data are presented as median (25th percentile; 75th percentile), category data are presented as number (percentage)
  2. Italic values represent significant differences compared with persistent asthma with P < 0.05 in the discovery cohort