Table 3 Risk of non-tuberculosis mycobacterial pulmonary disease according to waist circumferences (WC) and severity of underweight.

From: Severity of underweight affects the development of nontuberculous mycobacterial pulmonary disease; a nationwide longitudinal study

Body mass index

Waist circumstance

N

Events (n)

Incidence ratea

Model 1 (HRs, 95% CI)

Model 2 (HRs, 95% CI)

Model 3 (HRs, 95% CI)

 < 16.0 kg/m2

T1: < 75 cm in men, < 68 cm in women

13,920

112

0.89

7.64 (6.31, 9.24)

7.83 (6.47, 9.47)

6.26 (5.17, 7.58)

T2: 75–79 cm in men, 68–72 cm in women

1220

7

0.72

2.95 (1.40, 6.19)

3.07 (1.46, 6.44)

2.38 (1.13, 5.01)

T3: ≥ 80 cm in men, ≥ 73 cm in women

1098

3

0.35

1.16 (0.38, 3.61)

1.20 (0.39, 3.72)

1.13 (0.36, 3.50)

16.0–16.99 kg/m2

T1: < 75 cm in men, < 68 cm in women

46,807

205

0.45

5.31 (4.60, 6.13)

5.42 (4.69, 6.25)

4.73 (4.09, 5.46)

T2: 75–79 cm in men, 68–72 cm in women

4804

22

0.50

3.09 (2.03, 4.70)

3.29 (2.16, 5.01)

3.07 (2.02, 4.67)

T3: ≥ 80 cm in men, ≥ 73 cm in women

2227

10

0.54

1.98 (1.06, 3.68)

2.08 (1.12, 3.87)

1.99 (1.07, 3.71)

17.0–18.49 kg/m2

T1: < 75 cm in men, < 68 cm in women

239,705

591

0.25

3.46 (3.16, 3.79)

3.50 (3.19, 3.84)

3.27 (2.98, 3.59)

T2: 75–79 cm in men, 68–72 cm in women

49,062

135

0.28

2.51 (2.11, 2.99)

2.60 (2.18, 3.09)

2.35 (1.97, 2.80)

T3: ≥ 80 cm in men, ≥ 73 cm in women

16,102

49

0.33

1.71 (1.29, 2.27)

1.78 (1.34, 2.37)

1.64 (1.23, 2.17)

18.5–22.99 kg/m2

T1: < 75 cm in men, < 68 cm in women

1,049,852

1324

0.12

1.78 (1.66, 1.91)

1.76 (1.63, 1.89)

1.75 (1.62, 1.87)

T2: 75–79 cm in men, 68–72 cm in women

1,421,858

1701

0.12

1.32 (1.24, 1.41)

1.31 (1.23, 1.40)

1.31 (1.23, 1.40)

T3: ≥ 80 cm in men, ≥ 73 cm in women

1,485,874

2064

0.14

1 (ref.)

1 (ref.)

1 (ref.)

P for trendb

    

 < 0.0001

 < 0.0001

 < 0.0001

  1. Model 1, adjusted for age and sex; Model 2, model 1+ smoking, alcohol intake, and regular exercise; Model 3, model 2+ respiratory diseases, solid cancer, hematologic malignancy, transplantation, AIDS, GERD, connective tissue diseases, diabetes mellitus.
  2. HRs hazards ratios, 95% CI 95% confidence interval.
  3. aPer 1000 person-years.
  4. bP-values for the trend were < 0.0001 for all variables because of the large size of the study population.