Marco Boonstra

180 129 Linear and logistic regressions of secondary outcomes for the change between T0-T1 and T0-T2, without imputation and without correction for eGFR. Continuous secondary outcomes Group Baseline T1 T2 Intervention effect T0-T1 Intervention effect T0-T2 B (95% CI) p n B (95% CI) p n Health literacy1 mean (SD) CAU 23.0 (3.1) 23.8 (3.0) 23.7 (3.1) -0.27 (-1.18 to 0.63) 0.552 135 -0.19 (-1.06 to 0.67) 0.656 126 IG 23.9 (3.1) 24.1 (2.7) 24.2 (3.0) N of lifestyle topics discussed in consultation mean (SD) CAU 1.5 (1.1) 1.0 (1.1) 1.2 (1.2) 0.84 (0.39 to 1.29) <0.001 135 0.78 (0.31 to 1.26) 0.001 127 IG 1.0 (1.3) 1.3 (1.3) 1.4 (1.4) eGFR2 mean (SD) CAU 33.3 (14.5) 32.1 (16.9) -1.14 (-3.12 to 0.83) 0.253 114 IG 43.0 (15.8) 41.0 (17.3) BMI mean (SD) CAU 28.1 (5.4) 28.2 (5.4) 27.8 (4.4) 0.15 (-0.21 to 0.52) 0.401 132 -0.07 (-0.54 to 0.40) 0.768 126 IG 27.5 (4.4) 27.6 (4.6) 27.5 (4.5) Dichotomous secondary outcomes Group Baseline T1 T2 OR (95% CI) p n OR (95% CI) p n Hypertension % CAU 46.0 53.5 59.6 0.43 (0.18 to 1.02) 0.055 95 0.35 (0.16 to 0.78) 0.010 106 IG 38.2 30.2 32.7 Feeling understood by HCPs % CAU 70.8 69.6 72.5 5.15 (1.54 to 17.27) 0.008 115 1.42 (0.58 to 3.47) 0.444 111 IG 83.8 92.3 78.1 Encouraged by HCPs to ask questions % CAU 53.8 47.3 60.8 2.48 (1.08 to 5.69) 0.033 114 1.13 (0.51 to 2.52) 0.770 110 IG 66.7 68.2 62.5 HCPs listen to my preferred approach % CAU 58.5 55.4 64.7 3.30 (1.34 to 8.14) 0.009 115 1.30 (0.58 to 2.93) 0.526 109 IG 62.5 75.8 68.3 I can share my feelings/emotions with my HCPs % CAU 59.4 47.3 64.7 3.81 (1.67 to 8.72) 0.002 113 2.37 (0.93 to 6.06) 0.071 109 IG 61.1 72.7 76.6 Numbers in bold indicate significant results. B = parameter estimate of being in the IG for the difference T1-T0 or T2-T0, CI = confidence interval, SD = standard deviation, CAU = care-as-usual, IG = intervention group, OR = odds ratio for improvement in the IG compared to CAU between baseline and T1 or T2. 1 AAHLS questionnaire: scores from 10 to 30 with higher scores representing better health literacy. 2 eGFR = estimated glomerular filtration rate in ml/min/1.73m2; results of T1 not reported because they were not reliable (missing not at random). Supplementary file 1 continued

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