Assessing the Current Market of Sunscreen: A Cross-Sectional Study of Sunscreen Availability in Three Metropolitan Counties in the United States

Table 4

Available sun products by zip code with comparisons between high and low income zip codes. “High income” zip codes represent the aggregates 92127, 33156, and 60611. “Low income” zip codes represent the aggregates 92025, 33189, and 60622.

	Zip code	Number of sunscreens sampled	Tanning; oils %	SPF < 15%	SPF > 15%	Physical sunscreen %	Price per ounce	Spray %	Mean corrected SPF
Region	High income	552	16.3%	19.7%	59.6%	3.9%	1.97	40.3	30.8
	Lower income	1108	8.3%	12.2%	68.3%	3.1%	2.17	49.2	36.1
	𝑃 value		𝑃<0.01	𝑃<0.01	𝑃<0.01	𝑃=0.40	𝑃=0.03	𝑃<0.01	𝑃<0.01
San Diego County	92127	171	10.5%	20.5%	43.9%	4.6%	$2.12	40.5%	33.4
	92025	475	3.6%	15.4%	55.4%	3.3%	$2.25	48.7%	37.6
	𝑃 value		𝑃<0.01	𝑃=0.15	𝑃=0.01	𝑃=0.62	𝑃=0.03	𝑃=0.10	𝑃<0.01
Miami-Dade County	33156	259	23.9%	25.1%	59.5%	0.5%	$1.87	39.6%	26.3
	33189	404	15.1%	11.9%	71.8%	0.6%	$1.94	55.1%	32.6
	𝑃 value		𝑃<0.01	𝑃<0.01	𝑃<0.01	𝑃=0.70^∗	𝑃=0.01	𝑃<0.01	𝑃<0.01
Cook County	60611	122	8.2%	7.4%	82.0%	8.9%	$2.03	41.1%	36.6
	60622	229	6.1%	6.1%	89.1%	6.5%	$2.19	40.9%	39.3
	𝑃 value		𝑃=0.61	𝑃=0.82	𝑃=0.90	𝑃=0.53	𝑃=0.18	𝑃=0.92	𝑃=0.10

∗Fischer-exact test used in place of 𝜒².