Effect of a Family Medicine Wellness Group Program on Long-Term Weight Loss Maintenance Outcomes

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Figure 1.
Weight outcomes for patients who did not (A) and did (B) achieve CIWL in their first WG.

Table 1.

Summary Statistics for Percent Body Weight Loss (%WL) Achieved and Maintained^*

		%WL Achieved		%WL Maintained
	N	M	SD	M	SD
Total	310	6.48	0.49	3.51	1.12
Gender
Females	200	6.34	0.46	3.47	1.25
Males	110	6.47	0.54	3.51	1.12
Age group
18 to 44	101	6.25	0.53	1.00_a	1.37
45 to 59	98	6.10	0.51	3.34	1.11
60+	101	6.48	0.49	6.63_a	1.03
Starting BMI classification
Overweight	43	6.46	0.36	1.22_b	1.19
Obese I	112	7.01	0.48	2.48	0.92
Obese II	70	7.33	0.53	4.40	1.13
Obese III	85	6.28	0.52	6.83_b	1.12

↵*Means having a common letter in the subscript differ significantly at or beyond the 0.05 level of confidence.
Abbreviations: SD, Standard deviation; BMI, Body mass index.

Table 2.

Group Participation by CIWL Achievement^*^†

		Number of Sessions		Multiple Regular Groups		Any Multiple Groups	Any Advanced Groups
Attendance	N	M^‡	SD	M^§	SD	%^‖	%
Outcome
Lost at least 5%	179	13.49_a	2.03	1.87_b	1.22	39_c	62 days
Did not lose at least 5%	131	12.17_a	1.58	1.53_b	2.06	19_c	38 days

↵*Participants who achieved at least a 5% loss of their starting body weight versus those who did not.
↵^†Means having a common letter in the subscript differ significantly at or beyond the 0.05 level of confidence based on a t-test for independent group means. Percentages having a common letter in the subscript differ significantly at or beyond the 0.05 level of confidence based on a z-test for independent proportions.
↵^‡Mean number of sessions attended.
^§Mean number of groups attended.
^‖Percent of individuals who participated.
Abbreviations: CIWL, clinically important weight loss; SD, Standard deviation.

Table 3.

Group Participation by CIWL Maintenance^*

		Number of Sessions		Multiple Regular Groups			Any Multiple Groups	Any Advanced Groups
Attendance	N	M^†	SD	M^‡	SD	%^§	%	%
Outcome
Maintained a CIWL	96	13.72_a	1.67	1.95	1.11	45.4	61.2	632.5_b
Did not maintain a CIWL	83	13.29_a	1.44	1.82	1.31	49.5	62.1	48.1_b

↵*Means having a common letter in the subscript differ significantly at or beyond the 0.05 level of confidence based on a t-test for independent group means. Percentages having a common letter in the subscript differ significantly at or beyond the 0.05 level of confidence based on a z-test for independent proportions.
↵^†Mean number of sessions attended.
↵^‡Mean number of groups attended.
^§Percent of individuals who participated.
Abbreviations: CIWL, clinically important weight loss; SD, Standard deviation.

Table 4.

Demographic and Starting BMI Classification by Maintenance Outcomes^*

		Did Not Maintain CIWL	Maintained CIWL
		83	96
	N	%	%
Total	179
Gender
Females	109	67.5	55.8
Males	70	32.5	44.2
Age group
18 to 44	59	37.7	30.1
45 to 59	56	33.8	25.2
60+	64	28.6_a	44.7_a
Starting BMI classification
Overweight	26	18.1	11.5
Obese I	69	42.2	35.4
Obese II	48	26.5	27.1
Obese III	36	13.3_b	26.0_b

↵*Means having a common letter in the subscript differ significantly at or beyond the 0.05 level of confidence.
Abbreviations: CIWL, clinically important weight loss; SD, Standard deviation.