. 2023 Apr 13;141(5):441–447. doi: 10.1001/jamaophthalmol.2023.0610

Table 2. Propensity Score Matching Results Between First-Dose COVID-19 Vaccine Cohort and Influenza Vaccine Cohort.

Characteristic	Before matching			After matching
	No. (%)		SMD	No. (%)		SMD
	First dose COVID-19 (n = 3 108 829)	Influenza (n = 1 854 123)	SMD	First dose COVID-19 (n = 1 470 351)	Influenza (n = 1 470 351)	SMD
Age at vaccination, mean (SD), y	50.7 (20.4)	36.7 (27.1)	0.582	47.1 (22.3)	43.5 (25.6)	0.151
Sex^a
Female	1 753 009 (56.4)	1 036 860 (55.9)	0.009	862 940 (58.7)	837 386 (57.0)	0.035
Male	1 354 008 (43.6)	817 020 (44.1)	0.01	607 181 (41.3)	632 722 (43.0)	0.035
Ethnicity^b
Hispanic or Latinx	296 919 (9.6)	177 335 (9.6)	<0.001	125 288 (8.5)	149 593 (10.2)	0.057
Not Hispanic or Latinx	1 812 998 (58.3)	1 312 861 (70.8)	0.263	1 087 517 (74.0)	975 831 (66.4)	0.167
Unknown	998 912 (32.1)	363 927 (19.6)	0.288	257 546 (17.5)	344 927 (23.5)	0.148
Race^b
Asian	136 455 (4.4)	64 344 (3.5)	0.47	43 584 (3.0)	57 762 (3.9)	0.053
Black or African American	370 356 (11.9)	295 251 (15.9)	0.116	219 788 (14.9)	208 124 (14.2)	0.022
Native Hawaiian or Pacific Islander	5053 (0.2)	2705 (0.1)	0.004	1938 (0.1)	2453 (0.2)	0.009
White	2 001 510 (64.4)	1 230 187 (66.3)	0.041	1 057 736 (71.9)	974 054 (66.2)	0.123
Unknown	578 694 (18.6)	254 269 (13.7)	0.133	142 037 (9.7)	221 064 (15.0)	0.164
Comorbidities
Diabetes	384 601 (12.4)	270 707 (14.6)	0.074	286 471 (19.5)	241 233 (16.4)	0.08
Hypertension	871 147 (28.0)	578 208 (31.2)	0.069	614 363 (41.8)	525 770 (35.8)	0.124
Hyperlipidemia	623 080 (20.0)	432 096 (23.3)	0.079	462 943 (31.5)	395 253 (26.9)	0.101

Abbreviation: SMD, standardized mean difference.

^{^a}

Some data not reported.

^{^b}

Race and ethnicity were determined based on the presence of these designations within the electronic health record.