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

Table 3. Propensity Score Matching Results Between First-Dose COVID-19 Vaccine Cohort and Tdap Vaccine Cohort.

Characteristic	Before matching			After matching
	No. (%)		SMD	No. (%)		SMD
	First dose COVID-19 (n = 3 108 829)	Tdap (n = 743 991)	SMD	First dose COVID-19 (n = 718 400)	Tdap (n = 718 400)	SMD
Age at vaccination, mean (SD), y	50.7 (20.4)	38.1 (20.1)	0.617	39.8 (19.1)	39.1 (19.8)	0.034
Sex^a
Female	1 753 009 (56.4)	416 429 (56.0)	0.008	400 606 (55.8)	407 135 (56.7)	0.018
Male	1 354 008 (43.6)	327 454 (44.0)	0.009	317 639 (44.2)	311 157 (43.3)	0.018
Ethnicity^b
Hispanic or Latinx	296 919 (9.6)	68 999 (9.3)	0.009	63 406 (8.8)	68 924 (9.6)	0.027
Not Hispanic or Latinx	1 812 998 (58.3)	481 661 (64.7)	0.132	475 534 (66.2)	458 588 (63.8)	0.049
Unknown	998 912 (32.1)	193 331 (26.0)	0.136	179 460 (25.0)	190 888 (26.6)	0.036
Race^b
Asian	136 455 (4.4)	26 299 (3.5)	0.044	25 590 (3.6)	26 299 (3.7)	0.005
Black or African American	370 356 (11.9)	132 602 (17.8)	0.167	131 764 (18.3)	121 309 (16.9)	0.038
Native Hawaiian or Pacific Islander	5053 (0.2)	1574 (0.2)	0.011	1669 (0.2)	1543 (0.2)	0.004
White	2 001 510 (64.4)	485 322 (65.2)	0.018	476 199 (66.3)	471 055 (65.6)	0.015
Unknown	578 694 (18.6)	94 552 (12.7)	0.163	80 111 (11.2)	94 552 (13.2)	0.062
Comorbidities
Diabetes	384 601 (12.4)	62 119 (8.3)	0.132	66 268 (9.2)	62 071 (8.6)	0.02
Hypertension	871 147 (28.0)	145 859 (19.6)	0.199	153 887 (21.4)	145 716 (20.3)	0.028
Hyperlipidemia	623 080 (20.0)	96 179 (12.9)	0.193	100 469 (14.0)	96 120 (13.4)	0.018

Abbreviations: SMD, standardized mean difference; Tdap, tetanus, diphtheria, pertussis.

^{^a}

Some data not reported.

^{^b}

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