Table 1

Demographic characteristics of participants and those who reported wheeze, bronchitic symptoms, shortness of breath or secondhand nicotine vape exposure during the study period*

TotalWheeze†Bronchitic symptoms†Shortness of breath†Secondhand nicotine vape exposure†
N=2090N=510N=811N=480N=542
Race
 Asian72 (3.4)16 (3.1)27 (3.3)19 (4.0)17 (3.1)
 Black31 (1.5)9 (1.8)12 (1.5)2 (0.4)6 (1.1)
 Hispanic white1081 (51.8)214 (42.0)378 (46.7)254 (53.0)241 (44.5)
 Non-hispanic white732 (35.1)222 (43.5)320 (39.5)168 (35.1)237 (43.7)
 Others172 (8.2)49 (9.6)73 (9.0)36 (7.5)41 (7.6)
Parental education at baseline
 Completed grade 12 or less574 (27.5)113 (22.2)185 (22.8)142 (29.6)128 (23.6)
 Some college648 (31.0)164 (32.2)268 (33.0)154 (32.1)208 (38.4)
 Completed college or more622 (29.8)183 (35.9)279 (34.4)136 (28.3)153 (28.2)
 Missing246 (11.8)50 (9.8)79 (9.7)48 (10.0)53 (9.8)
Sex
 Female1036 (49.6)258 (50.6)419 (51.7)337 (70.2)264 (48.7)
 Male1054 (50.4)252 (49.4)392 (48.3)143 (29.8)278 (51.3)
  • 2 tests were performed comparing the demographic characteristics of participants with wheeze, bronchitic symptoms, shortness of breath, secondhand nicotine vape exposure to participants without the specific respiratory outcome or secondhand nicotine vape. N (%) is shown in the table. Significant differences (p<0.05) are shown in bold.

  • †Total number of participants reporting wheeze, bronchitic symptoms, shortness of breath or secondhand nicotine vape exposure, at least once, over the study period (waves 1–4).