Table 1 Demographic characteristics, underlying comorbidities, and monthly income in COP and reference cohorts.

From: Association between carbon monoxide poisoning and adrenal insufficiency: a nationwide cohort study

Variable

COP (n = 21,842)

Reference (n = 43,684)

Standardized difference**

Age (year)

36.2 ± 15.4

36.2 ± 15.4

< 0.1

Age (year)

   

  < 20

2470 (11.3)

4942 (11.3)

< 0.1

  20–34

8628 (39.5)

17,256 (39.5)

  35–49

6932 (31.7)

13,863 (31.7)

  50–64

2678 (12.3)

5355 (12.3)

  ≥ 65

1134 (5.2)

2268 (5.2)

Sex

   

  Female

10,970 (50.2)

22,733 (52.0)

< 0.1

  Male

10,872 (49.8)

20,951 (48.0)

Underlying comorbidity

   

  Hypertension

2340 (10.7)

4310 (9.9)

< 0.1

  Diabetes

1242 (5.7)

2069 (4.7)

< 0.1

  Hyperlipidemia

1613 (7.4)

3005 (6.9)

< 0.1

  Liver disease

2856 (13.1)

4941 (11.3)

< 0.1

  Thyroid disease

740 (3.4)

2403 (5.5)

0.1

  Mental disorder

6350 (29.1)

9902 (22.7)

0.1

Monthly income (NTD)

   

  < 20,000

15,780 (72.3)

27,341 (62.6)

0.2

  20,000–40,000

4840 (22.2)

12,127 (27.8)

  > 40,000

1222 (5.6)

4216 (9.7)

Follow-up period (year)

   

  Mean (standard deviation)

5.0 (3.5)

5.4 (3.4)

0.1

  Median (Q1–Q3)

4.7 (2.0–7.7)

5.2 (2.6–7.9)

  1. COP carbon monoxide poisoning; NTD New Taiwan Dollars. Data are expressed as mean ± standard deviation or n (%). **Take absolute value.