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Table 1 Demographic, cardiometabolic and dietary characteristics of the total sample at baseline

From: Long-term dietary intervention trials: critical issues and challenges

Demographic variable Early drop-outsa(n = 10) Drop-outs during study (n = 25) Completers (n = 36) P valueb
Initial diet allocation     
 High dairy 5 (7.0) 8 (11.3) 23 (32.4) 0.013c
 Low dairy 5 (7.0) 17 (23.9) 13 (18.3) 0.013c
Gender     
 Male 2 (10.0) 8 (40.0) 10 (50.0) NS
 Female 8 (15.7) 17 (33.3) 26 (51.0) NS
Presence of medical conditions 3 (30) 7 (28) 13 (36) NS
Taking medications 6 (60) 9 (36) 13 (36) NS
Alcohol consumption (>2×/week) 1 (10) 5 (20) 8 (22) NS
Physical activity (≥3×/week) 8 (80) 20 (80) 32 (89) NS
Age (years) 44 (12) 45 (16) 49 (14) NS
Weight (kg) 95 (15) 93 (19) 89 (17) NS
Waist circumference (cm) NA 101 (14) 98 (14) NS
Body mass index (kg/m2) 36 (6) 33 (5) 32 (6) NS
Total body fat (%) NA 45 (7) 43 (9) NS
Abdominal fat (%) NA 47 (6) 43 (7) 0.043
Systolic BP (mmHg) 125 (11) 132 (1) 127 (14) NS
Diastolic BP (mmHg) 75 (8) 78 (11) 74 (11) NS
Total psychological well-being (DASS)d NA 18 (17) 14 (19) NS
Depression NA 5.3 (7.9) 3.9 (6.2) NS
Anxiety NA 3.8 (4.0) 3.2 (5.9) NS
Stress NA 9.3 (8.3) 7.1 (7.8) NS
Energy intake (MJ/day) NA 8.8 (2.3) 8.9 (3.2) NS
Protein (g/day) NA 95 (26) 96 (32) NS
Fat (g/day) NA 82 (30) 80 (39) NS
Carbohydrate (g/day) NA 219 (66) 231 (90) NS
Alcohol (g/day) NA 8.5 (11.1) 7.6 (12.4) NS
Calcium (mg/day) NA 920 (352) 1096 (764) NS
  1. Demographic, cardiometabolic and dietary characteristics of the total sample (n = 71) at baseline, comparing those who withdrew before commencement of the intervention (early drop-outs) with those who withdrew during the study and with those who completed the 12-month study. Data presented as n (%) or mean (standard deviation). BP, blood pressure; NA, not assessed; NS, not significant. aParticipants withdrew between screening and baseline assessment. bAnalysis of variance for continuous variables; chi-square test for categorical variables. cAll drop-outs grouped together (n = 35) and compared with completers (n = 36). dDepression Anxiety Stress Scale (DASS) assessed only in the cognitive subgroup (drop-outs, n = 21; completers, n = 31); higher scores indicate greater depression/anxiety/stress.