Table 2 OLS results of standardized coefficients for commensality with multiple categories of peers and average scores

	Short term: first semester		Short term: second semester		Sustained
	β	95% CI	β	95% CI	β	95% CI
Roommates’ commensality	0.043	[0.000, 0.086]	0.042*	[0.001, 0.083]	0.064**	[0.019, 0.109]
Second category peers commensality	0.020	[−0.024, 0.064]	0.075***	[0.034, 0.116]	0.004	[0.000, 0.000]
Third category peers commensality	0.076**	[0.027, 0.125]	0.134***	[0.090, 0.178]	0.133***	[0.082, 0.184]
Commensality diversity index	0.037*	[0.002, 0.072]	0.094***	[0.061, 0.127]	0.019	[-0.019, 0.059]
College entrance exam scores	0.061*	[0.012, 0.110]	0.042	[−0.003, 0.083]	0.049	[−0.002, 0.102]
Political stattus	−0.071***	[−0.110, −0.032]	−0.044*	[−0.080, −0.008]	−0.043*	[−0.084, −0.002]
Class leader experience	0.005	[−0.068, 0.088]	0.011	[-0.023, 0.043]	0.004	[0.000, 0.000]
Gender	0.314***	[0.165, 0.463]	0.232***	[0.097, 0.367]	0.235**	[0.077, 0.393]
Constant	***		***		***
	(16.90)		(−12.88)		(−11.46)
N	2485		3007		2485
r2_a	0.366		0.313		0.289

The model includes dummy variables for student origin (SO_dummy) and class (C_dummy). For simplicity, detailed reports are omitted.
The model also controls for variables other than college entrance exam scores, political status, previous class leadership experience, and gender, as well as various characteristics of the three types of peers, including their college entrance exam scores and previous class leadership experience, which are also omitted from the table.
*p < 0.05, *p < 0.01, ***p < 0.001.

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