Respondent, boat and trip characteristics associated with reported low/no life jacket use
| Life jacket use | |||
|---|---|---|---|
| High (51–100%) | Low (0–50%) | ||
| (n=106) | (n=569) | ||
| % | % | RR (95% CI)* | |
| Respondent characteristics | |||
| Female† | 9 | 17 | 1.09 (1.01 to 1.17) |
| Age (years) | |||
| <30 | 8 | 11 | Ref |
| 30–39 | 14 | 18 | 0.99 (0.88 to 1.10) |
| 40–49 | 30 | 33 | 0.97 (0.88 to 1.08) |
| 50–59 | 36 | 25 | 0.89 (0.80 to 1.00) |
| 60+ | 12 | 14 | 0.97 (0.86 to 1.09) |
| Mean, SD | 48 (12) | 46 (12) | 0.98 (0.95 to 1.01)‡ |
| Some college | 79 | 77 | 0.98 (0.91 to 1.06) |
| Household median income, mean (SD)§ | 76 657 (21 534) | 76 315 (22 975) | 1.00 (0.99 to 1.01)¶ |
| Piloted today | 81 | 79 | 0.99 (0.87 to 1.11)** |
| Boat owner | 84 | 87 | 1.05 (0.92 to 1.20)†† |
| Years of boating experience | |||
| <5 | 10 | 11 | Ref‡‡ |
| 5–9 | 10 | 7 | 0.92 (0.78 to 1.10) |
| 10–19 | 15 | 17 | 1.02 (0.90 to 1.15) |
| 20–29 | 18 | 22 | 1.04 (0.93 to 1.17) |
| 30–39 | 25 | 20 | 0.98 (0.86 to 1.12) |
| 40+ | 22 | 23 | 1.06 (0.93 to 1.21) |
| Mean, SD | 25 (15) | 25 (15) | 1.01 (0.99 to 1.04)‡,‡‡ |
| Ever taken piloting or boat safety class§§ | 46 | 36 | 0.94 (0.87 to 1.01)¶ |
| Have WA State Boater Education Card§§ | 17 | 10 | 0.90 (0.78 to 1.03)*** |
| Times boating in last 12 months | |||
| <6 | 23 | 14 | Ref††† |
| 6–10 | 20 | 19 | 1.09 (0.95 to 1.24) |
| 11–20 | 21 | 31 | 1.14 (1.00 to 1.29) |
| 21–30 | 14 | 17 | 1.14 (1.00 to 1.30) |
| 31–40 | 7 | 5 | 1.04 (0.86 to 1.27) |
| 41+ | 17 | 15 | 1.09 (0.95 to 1.26) |
| Self-rated piloting skills | |||
| Expert | 49 | 44 | Ref‡‡‡ |
| Intermediate | 48 | 50 | 1.01 (0.95 to 1.09) |
| Beginner | 3 | 6 | 1.09 (0.95 to 1.25) |
| Boat characteristics | |||
| Boat length (feet) | |||
| <16 | 20 | 4 | Ref |
| 16–20 | 62 | 61 | 1.59 (1.21 to 2.08) |
| 21–25.5 | 18 | 34 | 1.71 (1.30 to 2.24) |
| Mean, SD | 17.8 (3.5) | 19.6 (2.8) | 1.03 (1.02 to 1.05) |
| Trip characteristics | |||
| Salt water | 64 | 55 | 0.94 (0.88 to 1.00) |
| Daily high temperature (Fahrenheit), mean (SD) | 66.7 (11.6) | 69.9 (11.5) | 1.04 (1.01 to 1.07)§§§ |
| Activity | |||
| Waterskiing, tubing, swimming or diving | 8 | 15 | Ref¶¶¶ |
| Fishing, hunting or crabbing | 58 | 52 | 0.98 (0.85 to 1.13) |
| Pleasure or cruising | 23 | 26 | 0.95 (0.86 to 1.06) |
| Transportation, maintenance, storage, other | 11 | 7 | 0.95 (0.79 to 1.14) |
| Any children (<10 years) onboard | 15 | 12 | 0.88 (0.79 to 0.99)**** |
| Any preteens/teens (10–18 years) onboard | 15 | 14 | 0.91 (0.82 to 1.01)†††† |
*Risk ratio and 95% CI.
The italicised values are means and standard errors rather than statistically significant findings.
†Male category is male respondent(s) only, Female category includes only female respondent or female and male respondents.
‡RR and 95% CI are per 10 years.
§US Census household median income within participant's zip code.
¶RR and 95% CI are per $10 000.
**Adjusted for gender, age, education, temperature, any rain and owner.
††Adjusted for gender, age, education, temperature, any rain and piloted.
‡‡Adjusted for gender, age and education.
§§Question was only asked of pilots, users (n=94); non-users (n=516).
¶¶Adjusted for age, ownership, education, usual water type and boat length.
***Adjusted for gender, education, ownership and usual water type.
†††Adjusted for gender, experience and boat length.
‡‡‡Adjusted for age, gender, education, experience, boat length, taken boating class and usual water type.
§§§RR and 95% CI are per 10°F.
¶¶¶Adjusted for age, gender, education, high temperature, any rain, time of day, boat length, boating frequency, taken boating class and usual water type.
****Adjusted for age, gender, education, boating frequency, high temperature, boat length and usual water type.
††††Adjusted for age, gender, education, experience, boating frequency, high temperature, any rain, boat length, activity and usual water type.