Table 1.

Subgroup Analysis for the Effect on HbA_1c

Study characteristics	HbA1c difference	95% LL	95% UL	P value for difference
	All studies included in the meta-analysis ( N  = 39)
RCT				0.005
Yes	−0.59	−0.76	−0.42
No	−1.07	−1.36	−0.78
>50% LEP				0.26
Yes	−0.75	−0.96	−0.55
No	−0.9	−1.06	−0.74
Multicomponent				0.85
Yes	−0.84	−1.1	−0.58
No	−0.87	−1.05	−0.68
>6 months				0.04
Yes	−0.69	−0.82	−0.57
No	−1.14	−1.55	−0.73
Face-to-face				0.97
Yes	−0.83	−0.94	−0.71
No	−0.82	−1.39	−0.25
CHW				0.91
Yes	−0.85	−0.99	−0.72
No	−0.83	−1.17	−0.49
Hispanic				0.93
Yes	−0.85	−0.99	−0.71
No	−0.83	−1.25	−0.4
>3 sessions				0.93
Yes	−0.8	−0.91	−0.68
No	−0.84	−1.69	0
	Subgroup analysis of RCTs ( n  = 16)
>50% LEP				0.66
Yes	−0.63	−0.96	−0.29
No	−0.54	−0.75	−0.33
Multicomponent				0.28
Yes	−0.75	−1.24	−0.27
No	−0.46	−0.66	−0.26
>6 months				0.03
Yes	−0.48	−0.66	−0.3
No	−0.98	−1.39	−0.58
Face-to-face				0.03
Yes	−0.82	−1.15	−0.48
No	−0.31	−0.63	0
CHW				0.30
Yes	−0.86	−1.4	−0.31
No	−0.53	−0.83	−0.23
Hispanic				0.94
Yes	−0.59	−0.78	−0.4
No	−0.61	−1.12	−0.1
>3 sessions				0.69
Yes	−0.64	−0.85	−0.42
No	−0.48	−1.22	0.27

CHW, community health worker; HbA_1c, hemoglobin A_1c; LEP, limited English proficiency; LL, lower limit; RCT, randomized controlled trial; UL, upper limit