TABLE 3.
Estimated bootstrap mean and 95% CIs of intra-rater reliability 1 for meal timing variables measured by 24-h dietary recall in the Interactive Diet and Activity Tracking in AARP2 dietary calibration sub-study, stratified by biological sex, BMI, day of recall, and season
| Subgroup | Sex – ICC (95% CI) |
BMI – ICC (95% CI) |
Day of recall – ICC (95% CI) |
Season – ICC (95% CI) |
||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Male | Female | P value | <25 kg/m2 | >25 kg/m2 | P value | Weekday | Weekend | P value | Spring/Summer | Autumn/Winter | P value | |
| Overnight fasting duration3 | ||||||||||||
| Mean ± SD | 11.40 ± 2.89 | 11.76 ± 2.59 | 11.58 ± 1.74 | 11.57 ± 2.75 | 11.44 ±2.73 | 11.91 ±2.78 | 11.59 ± 2.70 | 11.57 ± 2.81 | ||||
| 1 recall | 0.33 (0.26, 0.39) | 0.24 (0.18, 0.29) | 0.05 | 0.33 (0.24, 0.43) | 0.28 (0.22, 0.33) | 0.29 | 0.31 (0.26, 0.37) | 0.35 (0.24, 0.45) | 0.61 | 0.25 (0.19, 0.32) | 0.36 (0.28, 0.43) | 0.04 |
| 2 recalls | 0.49 (0.41, 0.57) | 0.38 (0.31, 0.45) | 0.04 | 0.50 (0.39, 0.60) | 0.43 (0.36, 0.49) | 0.29 | 0.48 (0.41, 0.54) | 0.51 (0.39, 0.62) | 0.62 | 0.40 (0.31, 0.48) | 0.53 (0.44, 0.60) | 0.04 |
| 3 recalls | 0.59 (0.51, 0.66) | 0.48 (0.40, 0.56) | 0.05 | 0.60 (0.48, 0.69) | 0.53 (0.46, 0.59) | 0.30 | 0.58 (0.51, 0.64) | 0.61 (0.48, 0.71) | 0.63 | 0.50 (0.41, 0.58) | 0.62 (0.54, 0.70) | 0.04 |
| 4 recalls | 0.66 (0.58, 0.72) | 0.55 (0.47, 0.62) | 0.05 | 0.66 (0.56, 0.75) | 0.60 (0.53, 0.66) | 0.30 | 0.65 (0.58, 0.70) | 0.67 (0.56, 0.77) | 0.64 | 0.57 (0.48, 0.65) | 0.69 (0.61, 0.75) | 0.04 |
| 5 recalls | 0.71 (0.64, 0.77) | 0.61 (0.53, 0.68) | 0.05 | 0.71 (0.61, 0.79) | 0.65 (0.59, 0.71) | 0.30 | 0.70 (0.64, 0.75) | 0.72 (0.61, 0.81) | 0.65 | 0.62 (0.53, 0.70) | 0.73 (0.66, 0.79) | 0.04 |
| 6 recalls | 0.74 (0.68, 0.88) | 0.65 (0.57, 0.71) | 0.05 | 0.75 (0.65, 0.82) | 0.69 (0.63, 0.74) | 0.30 | 0.73 (0.68, 0.78) | 0.76 (0.65, 0.83) | 0.65 | 0.66 (0.58, 0.74) | 0.77 (0.70, 0.82) | 0.04 |
| Midpoint of overnight fasting time4 | ||||||||||||
| Mean ± SD | 3.56 ± 4.89 | 3.26 ± 4.32 | 3.41 ± 5.06 | 3.41 ± 4.52 | 3.39 ± 4.75 | 3.46 ± 4.48 | 3.44 ± 4.69 | 3.38 ± 4.65 | ||||
| 1 recall | 0.33 (0.27, 0.38) | 0.29 (0.24, 0.35) | 0.38 | 0.36 (0.27, 0.44) | 0.29 (0.25, 0.34) | 0.20 | 0.18 (0.12, 0.25) | 0.11 (0.06, 0.17) | 0.13 | 0.30 (0.25, 0.36) | 0.35 (0.28, 0.42) | 0.30 |
| 2 recalls | 0.49 (0.43, 0.56) | 0.45 (0.38, 0.52) | 0.38 | 0.52 (0.43, 0.61) | 0.45 (0.40, 0.51) | 0.20 | 0.31 (0.21, 0.41) | 0.21 (0.12, 0.29) | 0.13 | 0.46 (0.40, 0.53) | 0.52 (0.44, 0.59) | 0.30 |
| 3 recalls | 0.59 (0.53, 0.65) | 0.55 (0.48, 0.62) | 0.38 | 0.62 (0.53, 0.70) | 0.55 (0.50, 0.60) | 0.20 | 0.40 (0.28, 0.51) | 0.28 (0.17, 0.38) | 0.13 | 0.56 (0.50, 0.63) | 0.61 (0.54, 0.68) | 0.30 |
| 4 recalls | 0.66 (0.60, 0.71) | 0.62 (0.55, 0.68) | 0.38 | 0.69 (0.60, 0.76) | 0.62 (0.57, 0.67) | 0.20 | 0.47 (0.34, 0.58) | 0.34 (0.21, 0.45) | 0.13 | 0.63 (0.57, 0.69) | 0.68 (0.61, 0.74) | 0.30 |
| 5 recalls | 0.71 (0.65, 0.76) | 0.67 (0.61, 0.73) | 0.38 | 0.73 (0.65, 0.80) | 0.67 (0.62, 0.72) | 0.20 | 0.52 (0.39, 0.63) | 0.39 (0.25, 0.50) | 0.13 | 0.68 (0.62, 0.74) | 0.73 (0.66, 0.78) | 0.30 |
| recalls | 0.74 (0.69, 0.79) | 0.71 (0.65, 0.76) | 0.38 | 0.77 (0.69, 0.83) | 0.71 (0.67, 0.75) | 0.20 | 0.57 (0.44, 0.67) | 0.43 (0.29, 0.55) | 0.13 | 0.72 (0.66, 0.77) | 0.76 (0.70, 0.81) | 0.31 |
| Number of eating episodes per day5 | ||||||||||||
| Mean ± SD | 3.72 ± 0.73 | 3.78 ± 0.68 | 3.79 ± 0.69 | 3.74 ± 0.71 | 3.78 ± 0.71 | 3.68 ± 0.70 | 3.74 ± 0.71 | 3.76 ± 0.70 | ||||
| 1 recalls | 0.34 (0.28, 0.40) | 0.23 (0.18, 0.29) | 0.01 | 0.29 (0.20, 0.39) | 0.29 (0.24, 0.34) | 0.98 | 0.31 (0.27, 0.36) | 0.25 (0.16, 0.33) | 0.18 | 0.27 (0.22, 0.33) | 0.33 (0.27, 0.39) | 0.17 |
| 2 recalls | 0.50 (0.43, 0.57) | 0.38 (0.31, 0.44) | 0.01 | 0.45 (0.34, 0.56) | 0.45 (0.39, 0.50) | 1.00 | 0.47 (0.42, 0.53) | 0.39 (0.27, 0.50) | 0.19 | 0.43 (0.36, 0.50) | 0.50 (0.43, 0.56) | 0.17 |
| 3 recalls | 0.60 (0.54, 0.66) | 0.48 (0.40, 0.55) | 0.01 | 0.55 (0.43, 0.65) | 0.55 (0.49, 0.60) | 0.99 | 0.58 (0.52, 0.63) | 0.49 (0.36, 0.60) | 0.19 | 0.53 (0.45, 0.60) | 0.60 (0.53, 0.66) | 0.18 |
| 4 recalls | 0.67 (0.61, 0.73) | 0.55 (0.47, 0.62) | 0.01 | 0.62 (0.50, 0.72) | 0.62 (0.56, 0.67) | 0.98 | 0.64 (0.59, 0.69) | 0.56 (0.43, 0.66) | 0.20 | 0.60 (0.53, 0.67) | 0.66 (0.60, 0.72) | 0.18 |
| 5 recalls | 0.72 (0.66, 0.77) | 0.60 (0.53, 0.67) | 0.01 | 0.67 (0.56, 0.76) | 0.67 (0.62, 0.72) | 0.98 | 0.69 (0.64, 0.74) | 0.61 (0.48, 0.71) | 0.21 | 0.65 (0.58 ,0.71) | 0.71 (0.65, 0.76) | 0.18 |
| 6 recalls | 0.75 (0.70, 0.80) | 0.65 (0.57, 0.71) | 0.01 | 0.71 (0.60, 0.79) | 0.71 (0.66, 0.75) | 0.97 | 0.73 (0.68, 0.77) | 0.66 (0.53, 0.75) | 0.21 | 0.69 (0.63, 0.75) | 0.75 (0.69, 0.79) | 0.18 |
ICC, intraclass correlation coefficient; IDATA, the Interactive Diet and Activity Tracking in AARP.
Intraclass correlation coefficients were calculated using a 1-way linear mixed effects model with and without fixed covariates.
IDATA participants completed ≤ 6 24-h dietary recalls.
Duration of overnight fasting (in h) was estimated by calculating the time between the first and the last eating episode of the day and subtracting from 24-h.
Midpoint of the overnight fasting period was calculated as the duration of overnight fasting divided by 2 and added to the start time of the overnight fasting.
The number of eating episodes was calculated as an ordinal variable and included any time-stamped eating episode associated with calorie-containing food or beverage consumption (≥25 calories).