. Author manuscript; available in PMC: 2012 Sep 1.

Published in final edited form as: Harmful Algae. 2011 Sep 1;10(6):744–748. doi: 10.1016/j.hal.2011.06.008

Table 1.

Demographics of entire study cohort (n=125); and Group 1 vs Group 2

Variable	All Asthmatics	Group 1	Group 2	P value^*
N	125	38	36
Age at entry ± Standard Deviation (Range in yrs)	40.5+/− 20.0 (12–73)	41.4+/−19.4 (12–73)	39.3+/−20.6 (12–66)	0.65
Female (%)	76 (61%)	25 (66%)	19 (53%)	0.25
White (%)	118 (95%)	32 (89%)	35 (97%)	0.18
Hispanic (%)	−3 (2.4%)	1 (3%)	0	0.50
Years with diagnosis ±SD (Range in yrs)	26.5+/−25.5 (0–88)	26.2+/−25.8 (0–88)	26.4+/−26.5 (1–88)	0.98
Positive History of symptoms with Florida Red Tide exposure (%)	110 (87%)	28 (85%)	24 (82%)	0.80
Current smoker (%)	8 (7.5%)	2 (6%)	2 (6%)	0.70
Hospitalized ≥1 in past year from Respiratory Causes (%)	18 (14.9%)	10 (29%)	1 (3%)	0.002
Used medications^a within 12 hours before first study exposure (%)^**	66 (52.4%)	24 (67%)	15 (42%)	0.03
Living >1 mile from Coast (%)^**	78 (69.9%)	21 (55%)	26 (72%)	0.13
Mean number of studies participated ±SD (Range in yrs)	5.7+/−3.0 (1–11)	2.6+/−0.9 (1–5)	9.2+/−1.4 (6–11)	0.001

Significance testing by ttest (or Fishers) or by Chi square;

^**

Asthma medications predominantly beta₂ agonists.