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Table 1 Descriptive characteristics of the health workers cohort study (HWCS) sample at baseline (2004) and follow up (2010) (N = 1268)

From: Soft drink intake is associated with weight gain, regardless of physical activity levels: the health workers cohort study

Characteristics2004
Mean (SD)
2010
Mean (SD)
Average change
Mean difference (SD)
Age (years)45.3 (12.7)52.3 (12.8)7.0 (1.5)
Soft drink intake (servings/ day)0.5 (0.7)0.4 (0.6)−0.1 (0.6)
Weight (Kg)66.9 (13.1)68.0 (13.7)1.1 (5.7)
BMI (kg/m2)26.5 (4.3)27.1 (4.5)0.6 (2.2)
BMI category, %
  < 25 kg/m238.935.5−3.4
  ≥ 25 kg/m260.164.54.4
 Physical activity (min/day)24.1 (29.2)21.3 (26.7)−2.8 (33.6)
Physical activity (min/day), %
 Low (< 21.44 min/day)61.366.65.3
 High (≥21.44 min/day)38.733.4−5.3
Education, %
 Elementary school12.412.2−0.2
 Secondary or high school37.436.7−0.7
 College or higher50.251.10.9
Smoking status, %
 Never58.355.5−2.8
 Past24.832.17.3
 Current17.012.3−4.7
Chronic diseases, %
 No90.685.2−5.4
 Yes9.414.85.4
Screen-time/ week, %
 3–4 h59.460.20.8
 5–6 h21.415.3−6.1
  ≥ 7 h19.224.55.3
 Total daily sleep (hours)8.0 (1.8)7.7 (1.8)−0.3 (2.1)
Alcohol intake (grams/day), %
 Low (≤12.5 g/day)91.493.52.1
 High (> 12.5 g/day)8.66.5−2.1
Food groups (servings/ day)
 Red meat (servings/day)0.9 (0.71)0.5 (0.5)−0.4 (0.8)
 Fruits (servings/day)4.0 (4.3)4.2 (4.6)0.2 (5.5)
 Vegetables (servings/day)4.3 (3.0)4.3 (5.0)−0.0 (5.6)
 Total dairy (servings/day)2.0 (1.3)1.5 (0.4)−0.5 (1.3)
 Nuts (servings/day)0.3 (0.5)0.4 (0.8)0.1 (0.9)
 Yogurt (servings/day)0.3 (0.5)0.2 (0.3)−0.1 (0.5)
 White bread (servings/day)0.4 (0.7)0.2 (0.4)−0.2 (0.7)
 Tortillas (servings/day)3.0 (1.9)3.0 (1.8)−0.0 (1.9)
 Orange juice (servings/day)0.4 (0.6)0.3 (0.5)−0.1 (0.7)
  1. Age, soft drink intake, weight, physical activity (min/day and METS min/day), total daily sleep and food groups are reported as means and standard deviations. The other variables are reported as column percentages. Soft drink intake considered cola and flavor soft drink. A serving of soft drink represents a bottle of 355 ml. Chronic diseases include cirrhosis, diabetes, cardiovascular diseases, cancer and kidney diseases. Low physical activity category (< 21.44 min /day) is equal to < 150 min/week and high physical activity category (≥21.44 min /day) is equal to ≥150 min/week, according with physical activity recommendations of WHO
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