Table 2.

Descriptive Statistics and Dyad-Level Pearson Correlations and Intraclass Correlations for Example FLASHE Survey Items

Construct (Survey)	Item example	n dyadsa	Adolescent M (SD)	Parent M (SD)	Pearson correlation	Intraclass correlationb
Psychosocial
External motivation for PA (PA)	I would exercise most days of the week because: Others would be upset with me if I didn’t  1 (Strongly Disagree) – 5 (Strongly Agree)	1,629	2.49 (1.25)	2.17 (1.17)	0.34	0.32
External motivation for fruits and vegetables (Diet)	I would eat fruits and vegetables every day because: Others would be upset with me if I didn’t  1 (Strongly Disagree) – 5 (Strongly Agree)	1,631	2.99 (1.33)	2.13 (1.19)	0.32	0.18
Barriers – Fruits and vegetables spoil (Diet)	I don’t eat fruits and vegetables as much as I like to because: They often spoil before I get a chance to eat them  1 (Strongly Disagree) – 5 (Strongly Agree)	1,638	2.55 (1.27)	3.09 (1.33)	0.38	0.32
Family (Parent-Child)
Support (Diet)	My parent(s) [My teenager] and I decide together how many fruits and vegetables I can have [he/she has to eat]  1 (Strongly Disagree) – 5 (Strongly Agree)	1,626	3.09 (1.32)	3.17 (1.22)	0.50	0.50
Support (PA)	My parent(s) [My teenager] and I decide together how much physical activity I have to do [he/she has to do]  1 (Strongly Disagree) – 5 (Strongly Agree)	1,623	2.75 (1.27)	2.83 (1.22)	0.52	0.52
Home environment
Availability of FV (Diet)	How often are the following foods and drinks available in your home?: Fruits or vegetables  1 (Never) – 5 (Always)	1,631	4.28 (0.91)	4.35 (0.84)	0.58	0.58
Neighborhood environment
Accessibility (pa)	Many shops, stores, markets or other places to buy things I need are within a 10–15 minute walk of my home  1 (Strongly Disagree) – 4 (Strongly Agree)	1,536	2.28 (1.12)	2.21 (1.15)	0.62	0.61
Crime (PA)	The crime rate in my neighborhood makes it unsafe to go on walks at night  1 (Strongly Disagree) – 4 (Strongly Agree)	1,630	1.82 (1.00)	1.87 (0.99)	0.63	0.63
Behavior
Daily frequency of fruit and vegetable intake (Diet)	Daily fruit and vegetable frequency computed from six items: 100% fruit juice, fruit, green salad, other non-fried vegetables, cooked beans, other (non-fried) potatoes  Items response options: 1 (I did not eat [food] during the past 7 days) – 6 (3 or more times per day). Items were recoded and summed to reflect daily fruit/vegetable frequency.	1,482	2.78 (2.04)	3.03 (1.94)	0.51	0.50

Notes: Boldface indicates statistical significance (p<0.001).

^a“n dyads” = dyads who have complete data on the analysis variable (both parent and adolescent provided non-missing responses). Note that the sample sizes for a particular item may be higher than the sample size in Table 1. The sample sizes in this table only require that parents and adolescents each responded to a particular item in one survey (e.g., diet or PA). The sample size in Table 1 is the number of dyads in which parents and adolescents each responded to both surveys (e.g., diet and PA).

^bThe Pearson correlation and intraclass correlation (ICC) are measures of the degree of association, or similarity, in responding among members of the same dyad. The Pearson and ICC can often be similar in dyadic data,¹¹ as seen in many of the example FLASHE variables in this table that have similar means and SDs. The approach used here for calculating the ICC can be found on the FLASHE webpage³⁷ in the FLASHE Dyadic Analysis User’s Guide and Sample Code (http://cancercontrol.cancer.gov/brp/hbrb/docs/FLASHE-Dyadic-Data-Users-Guide.pdf).

FLASHE, Family Life, Activity, Sun, Health, and Eating Study; FV, fruits and vegetables; PA, physical activity