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. Author manuscript; available in PMC: 2018 Nov 1.
Published in final edited form as: Contemp Clin Trials. 2017 Aug 12;62:77–90. doi: 10.1016/j.cct.2017.08.003

Table 2.

Anthropometric (Primary*) and Secondary Measures

Measure Timepoint Instrument Description Validity Reliability
Weight* 0, 16 week, 10-month Doran Digital Scale DS6100 Measured twice to the nearest 0.1 lbs, averaged -- --
Height* 0, 16 week, 10-month Seca 213 Stadiometer Measured twice to the nearest 0.01 inches, averaged -- --
Waist Circumference (WC) 0, 16 week, 10-month Tape measure Measured twice with inelastic tape to the nearest 0.1cm using NIH Guidelines [40]. r=0.62 for correlation between WC and visceral abdominal tissue among women [41] r=0.998 for intraclass correlation in females [42].
Blood Pressure 0, 16 week, 10-month Omron Digital Blood Pressure Monitor (HEM-907XL) Measured twice to the nearest 1 mmHg, averaged -- --
Blood Lipids 0, 16 week Cholestech LDX system Measures fasting blood lipids and glucose profiles from blood sample collected via finger stick TC, r =0.92; TRG, r = 0.93; HDL, r =0.92; LDL, r =0.86; with Lab values [43]. ρ > 0.75 ICC for all 4 lipid categories [44].
HbA1c 0, 16 week Bayer A1cNow+ Multi-Test A1c System HbA1c measure collected via finger stick r = 0.893 with Laboratory results [45]. Sensitivity 0.95, specificity 0.74, positive predictive value 0.85, negative predictive value 0.91 [45].
Diet 0, 16 week, 10-month Delta NIRI (short FFQ) 158-item questionnaire designed to assess African Americans food intake patterns [24] Statistical correlations in energy intake were demonstrated between Delta short FFQ and 24-hour dietary recalls [24] Energy adjusted correlations for macronutrient and micronutrient intakes between the short FFQ and 24-hour dietary recalls ranged from 0.13 – 0.54 [24]
Physical Activity 0, 16 week, 10-month Past Week Modifiable Physical Activity Questionnaire Self-report duration and type of physical activities completed in the past week r = 0.51 with pedometer [46]. r= 0.74 ICC for test-retest reliability [26]
Physical Activity 0, 16 week, 10-month Yamax Power Walker Ex-510 Pedometer Pedometer that stores daily step counts r = 0.98 with manual count [47]. Cronbach’s α =0.992 [48].
Estradiol (pg/mL) 0, 16 week 4mL Saliva, ELISA assay method in ZRT Lab Saliva collected in 4 consecutive weeks and sent to a laboratory to assay r = 0.71 with serum sample [49, 50]. CV = 5.2% in interassay [50]
Cortisol (ng/mL) 0, 16 week 4mL Saliva, EIA assay method in ZRT Lab Fasting morning saliva sent to a laboratory to assay r = 0.81 with serum sample [51, 52]. CV = 2.2% in interassay [53].