Table 3 Secondary outcomes by group allocation, of participants assigned to the intervention programme (n = 55) or usual care (n = 60)

From: A randomised controlled trial of a low-carbohydrate digitally-supported weight loss programme for type 2 diabetes

 

Intervention

Control

Estimated effect size (95% CI)

P value*

Weight (kg)

    

 Baseline weight (n = 115)

104.9 (23.5)

110.0 (19.2)

  

 3 month weight change (n = 108) (mean, SD)

–3.6 (3.6)

–0.7 (5.9)

2.6 (0.6 to 4.6)

0.0069*

 12 month weight change (n = 109) (mean, SD)

–2.4 (5.3)

–2.7 (5.9)

–0.4 (–2.3 to 1.6)

Systolic BP (mmHg)

    

 Baseline (n = 115)

131.7 (13.0)

133.6 (14.6)

  

 3 month change (n = 107) (mean, SD)

–2.1 (12.3)

–2.9 (13.0)

–0.8 (–6.0 to 4.4)

0.92

 12 month change (n = 105) (mean, SD)

–1.6 (14.2)

–0.9 (15.2)

0.2 (–5.0 to 5.4)

Diastolic BP (mmHg)

    

 Baseline (n = 115)

79.0 (9.4)

81.9 (10.0)

  

 3 month change (n = 107) (mean, SD)

–2.1 (9.1)

–3.2 (8.0)

–1.1 (–4.8 to 2.6)

0.35

 12 month change (n = 105) (mean, SD)

–1.0 (9.2)

–2.2 (11.2)

–1.5 (–5.2 to 2.2)

Lipid profile

    

Total cholesterol (mmol/L)

    

 3 month change (n = 104) (mean, SD)

–0.01 (0.86)

–0.19 (0.85)

–0.12 (–0.45 to 0.20)

0.68

12 month change (n = 104) (mean, SD)

–0.21 (0.61)

–0.35 (0.98)

–0.13 (–0.46 to 0.20)

Triglycerides (mmol/L)

    

 3 month change (n = 94) (mean, SD)

–0.07 (1.03)

–0.29 (1.28)

–0.19 (–0.64 to 0.26)

0.54

 12 month change (n = 93) (mean, SD)

–0.25 (0.86)

–0.19 (1.29)

0.06 (–0.39 to 0.51)

HDL cholesterol (mmol/L)

    

 3 month change (n = 96) (mean, SD)

0.03 (0.17)

0.04 (0.15)

–0.01 (–0.08 to 0.11)

0.67

 12 month change (n = 99) (mean, SD)

0.07 (0.39)

0.04 (0.15)

–0.03 (–0.12 to 0.06)

LDL cholesterol (mmol/L)

    

 3 month change (n = 81) (mean, SD)

–0.04 (0.52)

–0.10 (0.49)

–0.03 (–0.31 to 0.25)

0.97

 12 month change (n = 91) (mean, SD)

–0.22 (0.62)

–0.25 (0.78)

–0.03 (–0.30 to 0.24)

Total cholesterol:HDL ratio

    

 3 month change (n = 95) (mean, SD)

–0.11 (0.71)

–0.36 (0.87)

–0.21 (–0.53 to 0.12)

0.43

 12 month change (n = 98) (mean, SD)

–0.35 (0.67)

–0.55 (1.09)

–0.16 (–0.48 to 0.16)

Liver function

    

 ALT (iU/L)

    

 3 month change (n = 105) (mean, SD)

–3.3 (13.0)

–2.4 (10.9)

–0.3 (–5.5 to 4.8)

0.67

 12 month change (n = 103) (mean, SD)

–2.1 (15.4)

–4.1 (16.6)

–2.3 (–7.5 to 3.0)

ALP (iU/L)

    

 3 month change (n = 100) (mean, SD)

–2.0 (9.4)

–3.2 (12.5)

–1.0 (–7.3 to 5.2)

0.59

 12 month change (n = 98) (mean, SD)

–0.2 (19.1)

–4.2 (16.4)

–3.3 (–9.5 to 3.1)

Albumin (g/dL)

    

 3 month change (n = 105) (mean, SD)

0.4 (3.1)

0.8 (3.1)

0.4 (–0.6 to 1.4)

0.14

 12 month change (n = 103) (mean, SD)

–0.6 (2.3)

0.6 (2.3)

1.0 (0.01 to 2.1)

PAID score

    

 3 month change (n = 104) (mean, SD)

–12.3 (18.1)

–11.4 (16.2)

0.1 (–6.2 to 6.4)

0.34

12 month change (n = 102) (mean, SD)

–14.8 (17.2)

–10.0 (16.5)

4.2 (–2.1 to 10.5)

EQ5D-5L index value

    

 3 month change (n = 104) (mean, SD)

0.059 (0.135)

0.004 (0.149)

–0.056 (–0.111 to –0.002)

0.12

 12 month change (n = 103) (mean, SD)

0.041 (0.152)

0.001 (0.014)

–0.036 (–0.091 to 0.019)

EQ5D-5L VAS

    

 3 month change (n = 104) (mean, SD)

5.2 (17.6)

4.0 (19.7)

–1.0 (–9.0 to 7.1)

0.75

 12 month change (n = 102) (mean, SD)

4.5 (12.2)

5.9 (22.4)

2.2 (–5.9 to 10.3)

Diabetes medications

    

 Baseline number of diabetes meds

0.9 (0.6)

1.1 (0.9)

  

 3 month change in number of diabetes meds (mean, SD)

0.04 (0.3)

0.07 (0.3)

0.03 (–0.09 to 0.2)

0.89

 12 month change in number of diabetes meds (mean, SD)

0.09 (0.4)

0.1 (0.4)

0.009 (–0.1 to 0.1)

Number of participants taking antihypertensive medications

    

 3 month change (n, %)

0 (0)

0 (0)

  

 12 month change (n, %)

–1 (1.8)

0 (0)

  

Number of participants taking lipid lowering medications

    

 3 month change (n, %)

–1 (1.8)

3 (5)

  

 12 month change (n, %)

–2 (3.6)

5 (8.3)

  
  1. BP blood pressure, HDL high density lipoprotein, LDL low density lipoprotein, ALT alanine aminotransferase, ALP alkaline phosphatase, PAID problem areas in diabetes, EQ5D-5L EuroQuol Quality of Life assessment tool, 5D-5L version.
  2. *As per the primary analysis, an omnibus likelihood ratio test was conducted for each continuous secondary outcome measure to test the hypothesis of a significant change in each variable at 3 or 12 months.