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Table 6 Distribution of GAP points by each predictor according to total GAP score

From: Predicting survival of patients with idiopathic pulmonary fibrosis using GAP score: a nationwide cohort study

Variable

GAP Points

Total GAP score (n = 1,228)

p-value

  

1 (n = 150)

2 (n = 208)

3 (n = 376)

4 (n = 317)

5 (n = 138)

6 (n = 39)

 

Gender

       

<0.001

 Female

0

59 (39.3)

94 (45.2)

95 (25.3)

48 (15.1)

15 (10.9)

4 (10.3)

 

 Male

1

91 (60.3)

114 (54.8)

281 (74.7)

269 (84.9)

123 (89.1)

35 (89.7)

 

Age, yr

       

<0.001

 ≤60

0

121 (80.7)

76 (36.5)

45 (12.0)

15 (4.7)

6 (4.3)

-

 

 61–65

1

29 (19.3)

76 (36.5)

66 (17.6)

24 (7.6)

12 (8.7)

1 (2.6)

 

 >65

2

-

56 (26.9)

265 (70.5)

278 (87.7)

120 (87.0)

38 (97.4)

 

Physiology

 FVC, % predicted

       

<0.001

  >75

0

127 (84.7)

134 (64.4)

249 (66.2)

94 (29.7)

22 (15.9)

-

 

  50-75

1

23 (15.3)

71 (34.1)

121 (32.2)

211 (66.6)

92 (66.7)

22 (56.4)

 

  <50

2

-

3 (1.4)

6 (1.6)

12 (3.8)

24 (17.4)

17 (43.6)

 

 DLCO, % predicted

       

<0.001

  >55

0

143 (95.3)

172 (82.7)

263 (69.9)

147 (46.4)

10 (7.2)

-

 

  36–55

1

7 (4.7)

35 (16.8)

108 (28.7)

156 (49.2)

81 (58.7)

12 (30.8)

 

  ≤35

2

-

1 (0.5)

5 (1.3)

14 (4.4)

47 (34.1)

27 (69.2)

 
  1. Note: Values in parentheses are percentages
  2. “Cannot perform” in DLCO was not recorded in this study
  3. Total GAP score 3 group was compared with each group 2 and group 4 by Bonferroni adjustment. The following post hoc comparisons were significant at the adjusted p value = 0.05; Score 3 group versus Score 2 group (Gender, age, and DLCO, % predicted); Score 3 group versus Score 4 group (Gender, age, FVC, % predicted and DLCO, %predicted)
  4. GAP gender, age, and 2 lung physiology variables (FVC and DLCO)