Research Article
Factors Associated with Vitamin D Deficiency and Their Relative Importance among Indian Adolescents: An Application of Dominance Analysis
Table 1
Selected anthropometric and biological variables included in the regression analysis as independent variables.
| | Tool/method used for measurement | Indicator of | Mean ± SD |
| Anthropometric variables | Body mass index (BMI) | Digital SECA scales and three-piece wooden height/length boards | Overweight and obesity | 18.16 ± 4.03 | Height for age (z-score) | Digital SECA scales and three-piece wooden height/length boards | Stunting, wasting | | Mid-upper arm circumference (MUAC) (cm) | MUAC tape | Nutritional status | 21.95 ± 3.65 | Triceps skinfold thickness(TSFT) (cm) | Holtain skinfold calipers | Nutritional status | 9.81 ± 4.66 | Subscapular skinfold thickness (SSFT) (cm) | Holtain skinfold calipers | Nutritional status | 8.86 ± 4.16 | Waist circumference, (cm), cm | Fiber glass tapes | Abdominal obesity | 63.85 ± 9.10 |
| Biological variables | Hemoglobin level (g/dl) | Cyanmethemoglobin method | Anemia status | 12.93 ± 1.75 | Serum ferritin (μg/l) | Direct chemiluminescence method | Iron deficiency | 42.13 ± 38.15 | Serum retinol (μg/dL) | HPLC reversed-phase chromatography | Vitamin A deficiency | 32.64 ± 34.27 | Serum zinc (μg/dL) | (Not disclosed) | Zinc deficiency | 78.46 ± 15.89 | Serum vitamin B12 (ng/ml) | Competitive immunoassay using direct chemiluminescence | Vitamin B12 deficiency | 292.68 ± 141.55 | Urine iodine (μg/l) | Microplate method based on the Sandell-Kolthoff reaction | Iodine status | 238.65 ± 165.71 | Fasting plasma glucose (mg/dl) | Spectrophotometry | Diabetes | 90.96 ± 12.88 | Serum cholesterol (mg/dl) | Plasma lipid and lipoprotein levels | Cholesterol level | 140.61 ± 32.89 | Glycosylated hemoglobin (%) | Spectrophotometry | Diabetes | 5.23 ± 0.4 | Serum creatinine (mg/dl) | Spectrophotometry | Renal function | 0.64 ± 0.24 | Serum erythrocyte folate (ng/ml) | Competitive immunoassay using direct chemiluminescence | RBC folate deficiency | 221.89 ± 191.46 |
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