FIG. 2.

Pump use at 1 year by risk factors. ^aNumber of participants with missing data: health insurance (n=22), family structure (n=2), family income (n=338), parent education (n=184), race/ethnicity (n=20), diabetic ketoacidosis (DKA) at diagnosis (n=30). ^bKaplan–Meier incidence. ^cAdjusted for clinical center. ^d“Other” could be living with mother, living with father, splitting time with mother and father, living with legal guardian who is not parent, living away at school, or other. ^eAnalyzed as an ordinal variable. ^fAge effect varies by center (interaction P<0.01). For Center F, the incidence of pump use was 85% (n=8), 23% (n=16), 37% (n=77), and 24% (n=37) for ages<2, 2–<5, 5–<12, and 12–<19, respectively (P<0.001). For the other six centers the corresponding percentages were 30% (n=38), 30% (n=133), 26% (n=477), and 24% (n=226) for ages<2, 2–<5, 5–<12, and 12–<19, respectively (P=0.17). ^gMultivariate analysis using Cox regression. The model contains all factors with an adjusted value of P<0.10 to account for potential confounding, but only values of P<0.01 are considered statistically significant in this analysis. Factors with blank entries in the multivariate columns were excluded from the model because P>0.10. The reference group for each factor is designated with a hazard ratio of 1.0.