What statistics were calculated to describe body mass index (BMI) in this study?

Question

What statistics were calculated to describe body mass index (BMI) in this study? Were these appropriate? Provide a rationale for your answer.

TABLE 2 BASELINE CHARACTERISTICS AND HOMOGENEITY OF THE TREATMENT AND CONTROL GROUPS (n 21) Control (n-20) Mean t SD Mean t SD Age (rears) 65.95 t 8.59 0.154 66.35 t 7.94 Height (cm) 152.33 t 6.53 150.57 .01 0.896 Weight (kg) 54.66t 9.48 1.016 57.90 t 10.85 BMI (kg/m') 24.17 t 3.14 23.38 13.32 0.782 17.5 t 11.05 Years since menopause 20.21 t 10.44 0.767 Calcium-rich food intake (times/week) 23.8 t 8.8 27.3 11.4 Vitamin D-rich food intake (times/week) 2.4 t 2.5 0.705 3.1 t 3.1 (n 21) Control (n 20) Intervention Characteristic History of fracture 1.026 (23 times/week) 0.006 19 Non-drinker (alcohol) 20 95 20 100 0.024 Non-smo 21 100 20 100 0.024 Normal (T 2-1.0) 1.995 osteopenia (-1.0 >T>-2.5) 12 S-2.5) (n -21) Control (n- 20) Characteristic Mean t SD Mean t SD BMD Lumbar 2-4 0.83 t 0.12 0.85 t 0.20 0.526 Femur neck 0.67 t 0.15 0.67 t 0.13 0.055 Bone biomarkers Serum osteocalcin (ng/ml) 15.85 t 5.64 13.97 t 4.90 1.135 Serum calci mg/dl) 9.47 t 0.40 9.54 t 0.59 0.405 Serum phosphorus (mg/dl) 3.68 t 0.44 3.70 0.50 0.165 Serum alkaline phosphatase (IU/L) 68.43 t 21.52 66.70 t 13.24 0.308 Serum 25-OH-vitamin D (ng/ml) 12.38 t 4.65 14.03 t 4.34 Urine deoxpyridinoline (nM/mM creatinine) 5.70 t 1.700 5.95 t 1.12 0.555 Note SD, standard deviation BMD, bone mineral density (g/cm All group differences p: 0.05 "Defined from T score of femur nedk site based on word Health Organization oriteria. Oh, G., Yoo, Y., Lee, E., Hyun, S. S., Ko, l.S.& Chu, S. H. (2014). Effects ofa three-month therapeutic lifestyle modification program to improve bone health in postmenopausal Korean women in a rural commu A randomized controlled trial. Research in nity. Nursing Health, 374. P. 297.

Explanation / Answer

Body mass index for a particular person is calculated as ratio of weight(in kilogram) and square of height(in metres) of that person.

Here from the table it can be inferred from the given table that

Weight = 54.66 +_ 9.48

Height = 150.57 +- 6.01

As per the formula,B.M.I. falls in the range 23.38 +- 3.32 which is appropriate.

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