Table 1 Baseline characteristics of patients according to history of glaucoma surgery.

From: Association between glaucoma surgery and all-cause and cause-specific mortality among elderly patients with glaucoma: a nationwide population-based cohort study

Variable

Total (n = 16,210)

Surgery group (n = 487)

Non-surgery group (n = 15,723)

ASDa

Age (years)

   

0.228

 < 70

4862 (30.0)

192 (39.4)

4670 (29.7)

 

70–74

5912 (36.5)

165 (33.9)

5747 (36.6)

 

75–79

3509 (21.6)

89 (18.3)

3420 (21.8)

 

80–84

1454 (9.0)

34 (7.0)

1420 (9.0)

 

 ≥ 85

473 (2.9)

7 (1.4)

466 (3.0)

 

Mean ± SD

72.6 ± 5.6

71.4 ± 5.4

72.7 ± 5.6

0.237

Sex

   

0.022

Male

7051 (43.5)

217 (44.6)

11,646 (40.0)

 

Female

9159 (56.5)

270 (55.4)

17,498 (60.0)

 

Residence

   

0.036

Metropolitan

7033 (43.4)

203 (41.7)

6830 (43.4)

 

Provincial

9177 (56.6)

284 (58.3)

8893 (56.6)

 

Income

   

0.050

Below 20 percentiles

2954 (18.2)

98 (20.1)

2856 (18.2)

 

Above 20 percentiles

13,256 (81.8)

389 (79.9)

12,867 (81.8)

 

CCI

   

0.077

0

1798 (11.1)

57 (11.7)

1741 (11.1)

 

1

2742 (16.9)

82 (16.8)

2660 (16.9)

 

2

2885 (17.8)

94 (19.3)

2791 (17.8)

 

3

2519 (15.5)

77 (15.8)

2442 (15.5)

 

4

2052 (12.7)

65 (13.3)

1987 (12.6)

 

 ≥ 5

4214 (26.0)

112 (23.0)

4102 (26.1)

 

BMI (kg/m2)

23.9 ± 3.2

23.9 ± 3.2

23.9 ± 3.2

0.019

Smoking status

   

0.060

Non-smoker

12,847 (79.3)

393 (80.7)

12,454 (79.2)

 

Ex-smoker

1601 (9.9)

40 (8.2)

1561 (9.9)

 

Current smoker

1762 (10.9)

54 (11.1)

1708 (10.9)

 

Alcohol consumption

   

0.041

No

12,581 (77.6)

386 (79.3)

12,195 (77.6)

 

Yes

3629 (22.4)

101 (20.7)

3528 (22.4)

 

Regular exercise

   

0.028

No

13,381 (82.5)

407 (83.6)

12,974 (82.5)

 

Yes

2829 (17.5)

80 (16.4)

2749 (17.5)

 

Age-related macular degeneration

   

0.019

No

15,603 (96.3)

467 (95.9)

15,136 (96.3)

 

Yes

607 (3.7)

20 (4.1)

587 (3.7)

 

DM with ophthalmic manifestations

   

0.135

No

15,609 (96.3)

455 (93.4)

15,154 (96.4)

 

Yes

601 (3.7)

32 (6.6)

569 (3.6)

 

Severe cataract

   

0.040

No

12,968 (80.0)

397 (81.5)

12,571 (80.0)

 

Yes

3242 (20.0)

90 (18.5)

3152 (20.0)

 
  1. BMI body mass index, CCI Charlson Comorbidity Index, DM diabetes mellitus, ASD absolute standardized difference.
  2. Data are expressed as mean ± standard deviation (SD) or n (%).
  3. aASD of > 0.1 is considered a meaningful imbalance.
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