Table 1.
Subject demographics
| Demographics | % or M (SD) | % or M (SD) | Z value/χ2, p value | Effect size (Field’s r or Cramér’s V) | |
|---|---|---|---|---|---|
| Range | Girls (n = 54) | Boys (n = 115) | |||
| Ethnicitya | |||||
| Caucasian | 7% | 14% | |||
| African-American | 2% | 5% | |||
| Hispanic-American | 61% | 52% | |||
| American Indian/Alaskan Native | 9% | 2% | |||
| Multiethnic | 19% | 25% | |||
| Other | 2% | 1% | |||
| Age | 14–18 | 15.91 (1.20) | 16.14 (1.15) | −1.28, p = .20 | Field’s r = .10 |
| Family income (measured as free/discounted school lunch eligibility) | 1–3 | 2.35 (0.85) | 2.20 (0.89) | χ 2=1.11, p = .58 | Cramér’s V = .08 |
| Maternal educationb | 1–6 | 2.26 (1.39) | 2.19 (1.12) | −0.21, p = .84 | Field’s r = .02 |
| Paternal educationc | 1–6 | 2.06 (1.39) | 2.12 (1.26) | −0.83, p = .41 | Field’s r = .07 |
| Last completed school grade | 5–12 | 9.06 (1.25) | 9.23 (1.17) | −1.13, p = .26 | Field’s r = .09 |
| Frequency of condom use | 1–5 | 3.31 (1.27) | 3.50 (1.24) | −1.01, p = .31 | Field’s r = .08 |
| Frequency of sexual intercourse | 1–6 | 2.72 (1.63) | 3.16 (1.52) | −1.86, p = .06 | Field’s r = .14 |
| Pubertal development scale score (PDS) | 2–4 | 3.55 (0.41) | 3.07 (0.46) | 6.02, p < .001 | Field’s r = .46 |
School lunch = how much paid for full school lunch on three point scale (1 = full price, 2 = reduced price, 3 = free); parental education = 6 point scale (1 = did not graduate from high school, 2 = graduated high school/got GED, 3= some college but no degree, 4 = associates degree, 5 = bachelor’s degree, 6 = masters, PhD or MD); frequency of condom use = 5 point scale (1 = Never, 5 = Always); frequency of sexual intercourse = 6 point scale (1 = A few times a year, 2 = Once a month, 3 = Once a week, 4 = 2–3 times a week, 5 = 4–5 times a week, 6 = Almost every day). M mean; SD standard deviation.
aOne male participant did not provide race/ethnicity data.
bTwo male participants missing data.
cOne female and five males missing data.