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Table 3 Descriptive statistics and Pearson correlation coefficients for three week-28 diet recalls and the HSFFQ3 a

From: Use of a food frequency questionnaire in American Indian and Caucasian pregnant women: a validation study

  Overall By ethnicity By poverty level
  All Phase 2 participants American Indian Caucasian ≤ 100% 101–185%
Nutrient Mean of week-28 recalls (SD) Mean of HSFFQ3 (SD) Adjusted r b Deattenuated r c (95%CI) Deattenuated r c (95%CI) Deattenuated r c (95% CI) Deattenuated r c (95% CI) Deattenuated r c (95% CI)
Calories (kcal) 2162 (592) 2010 (735) NA NA NA NA NA NA
Carbohydrates (g) 286 (79) 246 (89) 0.26 0.35 (0.18, 0.50) 0.23 (-0.06, 0.49) 0.41 (0.21, 0.58) 0.43 (0.22, 0.60) 0.17 (-0.11, 0.42)
Protein (g) 81 (26) 82 (31) 0.29 0.40 (0.23, 0.54) 0.10 (-0.18, 0.37) 0.55 (0.34, 0.71) 0.45 (0.24, 0.63) 0.28 (-0.01, 0.53)
Dietary fiber (g) 15 (6) 13 (6) 0.31 0.43 (0.27, 0.57) 0.02 (-0.30, 0.33) 0.60 (0.41, 0.74) 0.51 (0.28, 0.69) 0.35 (0.10, 0.56)
Total fat (g) 80 (28) 81 (35) 0.48 0.63 (0.47, 0.75) 0.51 (0.18, 0.74) 0.66 (0.48, 0.79) 0.68 (0.50, 0.81) 0.45 (0.14, 0.68)
Saturated fat (g) 29 (11) 32 (13) 0.46 0.62 (0.46, 0.74) 0.42 (0.14, 0.64) 0.70 (0.49, 0.83) 0.65 (0.46, 0.78) 0.52 (0.23, 0.72)
Monounsaturated fat (g) 30 (12) 31 (13) 0.41 0.57 (0.38, 0.70) 0.53 (0.12, 0.79) 0.54 (0.33, 0.70) 0.64 (0.42, 0.80) 0.35 (0.04, 0.60)
Polyunsaturated fat (g) 14 (6) 13 (6) 0.21 0.33 (0.10, 0.52) 0.37 (-0.08, 0.69) 0.30 (0.03, 0.52) 0.41 (0.14, 0.63) 0.15 (-0.24, 0.50)
Omega 3 fatty acids (g) 0.04 (0.10) 0.04 (0.05) 0.26 0.52 (-0.12, 0.86) 0.33 (-0.14, 0.67) - 0.67 (-0.43, 0.97) 0.35 (-0.70, 0.92)
Percent energy from fat 33 (5) 36 (5) NA NA NA NA NA NA
Cholesterol 267 (148) 265 (128) 0.29 0.47 (0.24, 0.64) 0.35 (0.03, 0.61) 0.45 (-0.02, 0.76) 0.47 (0.17, 0.69) 0.45 (0.07, 0.72)
Sucrose 47 (23) 29 (13) 0.23 0.27 (0.09, 0.43) 0.23 (-0.07, 0.50) 0.27 (0.06, 0.47) 0.21 (-0.01, 0.40) 0.50 (0.17, 0.72)
Calcium 1364 (639) 1464 (502) 0.39 0.48 (0.33, 0.60) 0.39 (0.07, 0.63) 0.39 (0.20, 0.55) 0.47 (0.27, 0.62) 0.52 (0.28, 0.70)
Iron (mg) 61 (30) 59 (21) 0.44 0.51 (0.38, 0.63) 0.51 (0.25, 0.70) 0.50 (0.33, 0.64) 0.68 (0.50, 0.80) 0.35 (0.11, 0.55)
Magnesium (mg) 291 (105) 271 (98) 0.39 0.50 (0.35, 0.62) 0.43 (0.08, 0.69) 0.55 (0.36, 0.69) 0.49 (0.29, 0.66) 0.52 (0.28, 0.70)
Phosphorus (mg) 1475 (517) 1565 (537) 0.36 0.46 (0.30, 0.59) 0.26 (-0.04, 0.52) 0.42 (0.22, 0.59) 0.41 (0.20, 0.59) 0.54 (0.29, 0.73)
Zinc (mg) 30 (13) 31 (10) 0.48 0.60 (0.46, 0.72) 0.55 (0.27, 0.75) 0.58 (0.41, 0.71) 0.79 (0.61, 0.89) 0.41 (0.15, 0.61)
Vitamin A (IU) 11926 (9178) 10943 (4962) 0.25 0.35 (0.19, 0.50) 0.32 (0.01, 0.57) 0.36 (0.15, 0.53) 0.42 (0.19, 0.60) 0.28 (0.03, 0.50)
Vitamin E (mg) 16 (7) 13 (4) 0.34 0.44 (0.28, 0.58) 0.38 (0.07, 0.63) 0.45 (0.27, 0.61) 0.62 (0.42, 0.76) 0.26 (-0.01, 0.49)
Vitamin C (mg) 189 (84) 220 (88) 0.31 0.40 (0.24, 0.54) 0.26 (-0.06, 0.52) 0.41 (0.21, 0.57) 0.42 (0.21, 0.59) 0.37 (0.10, 0.58)
Vitamin B1 (mg) 3 (1) 3 (1) 0.38 0.52 (0.37, 0.65) 0.51 (0.22, 0.72) 0.51 (0.32, 0.66) 0.60 (0.41, 0.74) 0.43 (0.16, 0.65)
Vitamin B2 (mg) 4 (1) 4 (1) 0.44 0.56 (0.42, 0.68) 0.58 (0.30, 0.77) 0.52 (0.34, 0.67) 0.66 (0.48, 0.79) 0.46 (0.22, 0.65)
Niacin (mg) 36 (11) 34 (10) 0.32 0.45 (0.29, 0.58) 0.38 (0.12, 0.60) 0.51 (0.30, 0.68) 0.54 (0.35, 0.69) 0.31 (0.03, 0.54)
Folate (mcg) 888 (372) 936 (302) 0.45 0.55 (0.40, 0.66) 0.53 (0.23, 0.74) 0.52 (0.34, 0.66) 0.66 (0.47, 0.79) 0.42 (0.18, 0.61)
Vitamin B6 (mg) 4 (1) 4 (1) 0.41 0.52 (0.37, 0.64) 0.40 (0.13, 0.62) 0.54 (0.36, 0.69) 0.60 (0.41, 0.74) 0.42 (0.17, 0.62)
Vitamin B12 (mcg) 9 (4) 9 (4) 0.31 0.46 (0.30, 0.60) 0.27 (-0.07, 0.55) 0.53 (0.33, 0.69) 0.48 (0.26, 0.66) 0.42 (0.15, 0.64)
  Average correlation: 0.35 0.47 0.37 0.50 0.54 0.40
  1. SD, standard deviation; CI, confidence interval
  2. a Excluded if calories > 4500 (n = 2) or age < 16 (n = 2) on the HSFFQ3 (n = 242)
  3. b Adjusted for total energy intake
  4. c Adjusted for total energy intake and corrected for random within-person variation; omega 3 fatty acids and polyunsaturated fat not included in average deattenuated correlations stratified by ethnicity and poverty level