Table 3.
Accuracy and validity of child overweight and obesity classification based on parent-reported data as compared to electronic health record data
| By child Age | By child race/ethnicity | ||||||
|---|---|---|---|---|---|---|---|
| Weight classification | All | Ages 3–5 y | Ages 6–12 y | NonHispanic White | Black | Latino | Asian |
| (N = 558) | (N = 225) | (N = 333) | (N = 189) | (N = 68) | (N = 186) | (N = 85) | |
| % (95% CI) | % (95% CI) | % (95% CI) | % (95% CI) | % (95% CI) | % (95% CI) | % (95% CI) | |
| Overweight/obese (BMI-for-age percentile ≥ 85) | |||||||
| Kappa | 0.58 (0.53–0.63) | 0.50 (0.39–0.55) | 0.63 (0.54–0.70) | 0.57 (0.44–0.66) | 0.63 (0.41–0.68) | 0.55 (0.42–0.64) | 0.60 (0.39–0.70) |
| Sensitivity | 89.8 (85.3–93.2) | 91.7 (82.1–96.8) | 89.0 (83.7–93.0) | 86.7 (76.8–93.3) | 96.4 (82.9–99.8) | 88.9 (81.3–94.2) | 90.0 (75.6–97.3) |
| Specificity | 72.8 (70.2–74.8) | 69.7 (66.2–71.6) | 75.5 (71.5–78.6) | 76.0 (71.4–79.1) | 70.0 (60.5–72.4) | 67.6 (61.8–71.7) | 74.5 (66.7–78.5) |
| Positive predictive value | 65.7 (62.5–68.2) | 52.4 (46.9–55.3) | 73.7a (69.4–77.0) | 62.7 (55.5–67.5) | 69.2 (59.5–71.7) | 67.9 (62.2–71.9) | 65.9 (55.3–71.2) |
| Obese (BMI-for-age percentile ≥ 95) | |||||||
| Kappa | 0.54 (0.47–0.60) | 0.44 (0.31–0.51) | 0.60 (0.50–0.68) | 0.56 (0.39–0.68) | 0.55 (0.30–0.69) | 0.53 (0.40–0.61) | 0.48 (0.26–0.58) |
| Sensitivity | 83.6 (76.4–89.3) | 84.4 (68.1–94.0) | 83.3 (74.9–89.7) | 78.6 (61.1–90.4) | 84.2 (63.4–95.6) | 87.8 (76.4–94.7) | 87.5 (63.4–97.8) |
| Specificity | 81.4c (79.5–82.9) | 79.3c (76.6–80.9) | 83.1c (80.3–85.3) | 88.3c (85.3–90.3) | 78.0b (70.1–82.3) | 75.2b (71.1–77.7) | 76.8 (71.2–79.2) |
| Positive predictive value | 54.2c (49.5–57.8) | 40.3c (32.5–44.9) | 62.5ac(56.2–67.3) | 53.7 (41.7–61.8) | 59.3 (44.6–67.3) | 55.8c (48.6–60.3) | 46.7c (33.8–52.1) |
Notes: All analyses restricted to children with data from both sources; CI = Confidence interval; Kappa statistic is not a percentage.
aSignificant difference between age groups by t-test (P < .05).
bSignificantly different from nonHispanic Whites by t-test (P < .05).
cSignificantly different from same statistic for Overweight/obese by t-test (P < .05).