Accurate weight gain perception may inhibit weight loss compared to inaccurate weight gain perception among Japanese adults

Figures & data

Figure 1. Flow chart of the exclusion of the study participants

Table 1. Sample description in 2013 and 2014 by weight gain perception

Median (25th–75th percentiles) or n (%)	Accurate group (N=1679)	Inaccurate group (N=1998)	P-value ^a
Gender Male Female Age (years) Age group 40–49 50–59 60–69 ≥70 Weight in 2013 (kg) Weight in 2014 (kg) Weight change (kg) ^b Regular physical exercise Daily physical activity Medication Hypertension Diabetes Dyslipidemia	841 (50.1)838 (49.9) 64.0 (57.0–67.0)217 (12.9)328 (19.5)871 (51.9)263 (15.7)61.3 (54.0–70.5)65.6 (58.3–75.2)3.9 (3.4–5.0)556 (33.1)576 (34.3)693 (41.3)182 (10.8)449 (26.7)	1128 (56.5)870 (43.5)65.0 (60.0–69.0)164 (8.2)303 (15.2)1055 (52.8)476 (23.8)59.0 (52.2–66.7)63.0 (56.1–70.625)3.5 (3.2–4.2)710 (35.5)806 (40.3)849 (42.5)188 (9.4)476 (23.8)	<0.001<0.001<0.001<0.001<0.001<0.0010.124<0.0010.4560.1510.042

a: P–value of chi-square test for categorical variables and of Mann-Whitney U test for continuous variables

b: Weight change between 2013 and 2014

Table 2. Weight change between 2014 and 2015 by weight gain perception

Median (25th–75th percentiles)	Accurate group (N=1679)	Inaccurate group (N=1998)	P-value ^a
Weight in 2015 (kg) Weight change (kg) ^b	65.1 (57.3–74.2) −0.50 (−2.1–1.0)	62.4 (55.2–70.0) −0.70 (−2.0–0.6)	<0.001 0.032

a: P-value of Mann-Whitney U test

b: Weight change between 2014 and 2015

Table 3. Estimates of association of weight gain perception and weight change between 2014 and 2015 (N=3677)

	Weight-adjusted	Covariate-adjusted
Weight gain perception Inaccurate group Accurate group Gender Male Female Age group 40–49 50–59 60–69 ≥70 Weight in 2014 Regular physical exercise ^a Daily physical activity ^b Medication Hypertension Diabetes Dyslipidemia	Ref. 0.185 (0.008, 0.362)^※ −0.025 (−0.032, −0.018)^※	Ref. 0.217 (0.037, 0.397)^※ Ref. −0.307 (−511, −0.103) ^※ Ref. 0.043 (−0.305, 0.390) −0.039 (−0.355, 0.277) −0.101 (−0.466, 0.263) −0.033 (−0.041, −0.024)^※ −0.002 (−0.211, 0.207) −0.051 (−0.254, 0.153) 0.139 (−0.054, 0.331) 0.092 (−0.207, 0.390) −0.045 (−0.259, 0.169)

Data are presented as regression coefficients (95% confidence intervals).

^※P-value < 0.05