Table 1 Baseline characteristics before and after propensity score matching (No. [%]).

From: Unmasking an ocular risk: keratoconus in atopic dermatitis patients treated with dupilumab

 

Before Matching

After Matching

Characteristic Name

Dupilumab Cohort

Control Cohort

Standardised

Dupilumab Cohort

Control Cohort

Standardised

(n = 39,287)

(n = 709,749)

Mean Differencea

(n = 39,285)

(n = 39,285)

Mean Differencea

Age at Index, Mean ± Standard Deviation

34.5 ± 24.6

21.8 ± 24.8

0.5105

34.5 ± 24.6

34.6 ± 24.8

0.0047

Gender (%)

 Male

45.86%

44.53%

0.0268

45.86%

45.66%

0.004

 Female

52.67%

53.64%

0.0194

52.67%

52.86%

0.0039

Race (%)

 White

51.00%

44.59%

0.1286

51.00%

51.22%

0.0044

 Black or African American

21.16%

23.15%

0.0479

21.16%

21.21%

0.0011

 Asian

9.21%

8.09%

0.0396

9.21%

9.21%

0.0001

 Native Hawaiian or Other Pacific Islander

0.73%

0.85%

0.0134

0.73%

0.71%

0.003

 American Indian or Alaska Native

0.66%

0.60%

0.0078

0.66%

0.64%

0.0022

 Other Race

5.13%

7.61%

0.1017

5.13%

5.01%

0.0057

 Unknown Race

12.10%

15.10%

0.0875

12.10%

12.01%

0.003

Ethnicity (%)

 Hispanic or Latino

8.24%

12.58%

0.1426

8.24%

8.08%

0.006

 Not Hispanic or Latino

68.00%

58.58%

0.1962

67.99%

68.05%

0.0013

 Unknown Ethnicity

23.77%

28.84%

0.1153

23.77%

23.87%

0.0025

Comorbidities (%)

 Conjunctivitis

13.39%

12.55%

0.025

13.39%

13.08%

0.0091

 Allergies

7.07%

3.32%

0.1694

7.06%

6.86%

0.0078

 Dry eye syndrome

4.22%

2.68%

0.0849

4.22%

3.84%

0.0195

 Systemic connective tissue disorders

3.08%

1.48%

0.1071

3.07%

2.66%

0.0249

 Localised connective tissue disorders

1.11%

0.64%

0.0512

1.11%

0.85%

0.0272

 Down syndrome

0.10%

0.19%

0.025

0.10%

0.09%

0.0034

Visits (%)

 Ophthalmology Visits

11.46%

7.73%

0.1269

11.46%

11.24%

0.0068

  1. aCovariate balance after matching was assessed using standardised mean differences, with values below 0.10 indicating adequate balance.