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. Author manuscript; available in PMC: 2018 Nov 1.
Published in final edited form as: Soc Sci Med. 2017 Sep 23;193:23–32. doi: 10.1016/j.socscimed.2017.09.041

Table 1.

Class-Conditional Response Probabilities from Latent Class Analyses (LCA) for Adolescent Health Lifestyles (Wave I, ages 15–17)

Population average Consistently positive Mixed Mid, sleep problems Passive Unsafe, no substance use Substance users and unsafe Mostly negative
Class membership probabilities 26% 10% 15% 17% 16% 8% 9%
Physical activity
Weekly activity count
 0 0.37 0.15 0.16 0.38 0.75 0.30 0.44 0.57
 1–2 0.31 0.32 0.24 0.34 0.23 0.34 0.33 0.37
 3–15 0.32 0.53 0.60 0.29 0.02 0.37 0.23 0.06
Weekly screentime hours
 0–14 0.48 0.53 0.40 0.59 0.48 0.31 0.56 0.37
 14.001–28 0.28 0.30 0.26 0.27 0.33 0.23 0.26 0.26
 28.001+ 0.25 0.16 0.34 0.14 0.19 0.46 0.18 0.37
Substance use
Any tobacco use last 30 days 0.32 0.05 0.58 0.62 0.06 0.17 0.84 0.61
Marijuana use last 30 days 0.17 0.00 0.29 0.29 0.00 0.02 0.98 0.27
Other drug use last 30 days 0.07 0.00 0.03 0.07 0.01 0.00 0.65 0.03
Alcohol use in last 12 months
 Nondrinker 0.46 0.71 0.08 0.08 0.75 0.73 0.07 0.09
 Drinker 0.13 0.16 0.06 0.11 0.21 0.11 0.00 0.11
 Problem drinking 0.42 0.13 0.86 0.81 0.04 0.17 0.93 0.79
Diet
Ate 2 fruits and 2 vegetables yesterday 0.16 0.26 0.17 0.17 0.11 0.14 0.14 0.00
Does not eat breakfast 0.23 0.10 0.11 0.30 0.26 0.20 0.36 0.46
Disordered behaviors to lose weight 0.01 0.00 0.00 0.03 0.01 0.01 0.00 0.02
Safety
Got in fight last year 0.31 0.18 0.54 0.27 0.05 0.54 0.58 0.41
Doesn’t always wear helmet 0.70 0.78 0.77 0.66 0.51 0.80 0.80 0.54
Always wears seatbelt 0.53 0.74 0.46 0.53 0.71 0.25 0.27 0.33
Ever driven drunk 0.07 0.00 0.14 0.16 0.00 0.00 0.34 0.10
Health care in last year
Dental exam 0.69 0.82 0.78 0.81 0.69 0.45 0.75 0.43
Physical examination 0.67 0.76 0.86 0.71 0.56 0.66 0.65 0.39
Sleep
Gets enough sleep 0.70 0.81 0.93 0.40 0.73 0.71 0.54 0.74
9+ hours sleep 0.21 0.26 0.36 0.01 0.22 0.20 0.19 0.32
Last sex
 Never had sex 0.56 0.86 0.26 0.43 0.78 0.54 0.22 0.17
 Condom 0.26 0.10 0.56 0.30 0.13 0.29 0.38 0.36
 Birth control, no condom 0.04 0.02 0.02 0.06 0.02 0.02 0.12 0.06
 No contraception 0.14 0.02 0.16 0.21 0.07 0.15 0.28 0.41

Source: Add Health

Notes: LCA adjust for clustering and weighting. N=6605. Underlining indicates that the probability is better for health compared to the overall mean (greater or less than the 95% confidence interval around the overall mean); shading indicates that the probability is significantly worse for health. Bold (better for health) or italics (worse for health) represent greatest difference from mean.