From: Dietary carotenoid intake and fracture risk based on NHANES 2013–2018 data: a propensity score matching
Variable
Mean ± SD
Reference value
Calcium (mg/day/kcal)
0.89 ± 0.47
1.00 ~ 1.200
Vitamin D (mg/day/kcal)
4.00 (2.00, 7.25)
1.00 ~ 4.00
Physical activity (hour/day)
1.67 (0.77, 1.57)
1.2 ~ 1.95