Table 2.

Moderated regression analyses assessing main and interactive effects of the impact of time spent on social media, total number of social media accounts used, and exposure to weight loss content on body image and disordered eating behaviors.

Step		Body Appreciation Scale

		B (95 % CI)	β	t	R²	ΔR (Dean, 2021)	ΔF	df		B (95 % CI)	β	t	R²	ΔR (Dean, 2021)	ΔF	df

1	Gender	0.46 (0.15, 0.77)	0.18	2.92^*	0.15	0.15	20.00^*^,#	2232	Gender	0.47 (0.15, 0.78)	0.18	2.99^*	0.12	0.12	16.00^*^,#	2225
	BMI	−0.06 (−0.08, −0.03)	−0.25	−3.99^*^,#					BMI	−0.05 (−0.08, −0.02)	−0.22	−3.49^*^,#
2	Min SM	−0.001 (−0.002, 0.001)	−0.06	−0.80	0.20	0.05	6.95^*^,#	2230	# SM	−0.04 (−0.10, 0.01)	−0.11	−1.62	0.17	0.05	6.05^*^,#	2223
	WL	−0.62 (−0.99, −0.26)	−0.21	−3.37^*^,#					WL	−0.60 (−0.98, −0.23)	−0.21	−3.20^*^,#
3	Min SM × WL	0.000 (−0.003, 0.002)	−0.02	−0.32	0.20	0.00	0.10	1229	# SM × WL	0.06 (−0.06, 0.18)	0.07	0.98	0.17	0.004	0.95	1222

Step		Fear of Negative Appearance Evaluation Scale

		B (95 % CI)	β	t	R²	ΔR (Dean, 2021)	ΔF	df		B (95 % CI)	β	t	R²	ΔR (Dean, 2021)	ΔF	df

1	Gender	−0.81 (−1.10, −0.51)	−0.32	−5.41^*^,#	0.18	0.18	24.43^*^,#	2227	Gender	−0.81 (−1.10, −0.51)	−0.32	−5.44^*^,#	0.17	0.17	23.15^*^,#	2221
	BMI	0.02 (−0.003, 0.05)	0.11	1.73					BMI	0.02 (−0.01, 0.04)	0.07	1.19
2	Min SM	0.001 (−0.001, 0.002)	0.06	0.79	0.24	0.07	10.03^*^,#	2225	# SM	0.07 (0.02, 0.12)	0.19	2.80^*	0.27	0.09	13.83^*^,#	2219
	WL	0.70 (0.35, 1.04)	0.25	4.02^*^,#					WL	0.70 (0.36,1.04)	0.25	4.06^*^,#
3	Min SM × WL	0.001 (−0.001, 0.003)	0.05	0.68	0.25	0.002	0.46	1224	# SM × WL	−0.01 (−0.12, 0.10)	−0.01	−0.14	0.27	0.000	0.02	1218

Step		Binge eating frequency

		B (95 % CI)	β	t	R²	ΔR (Dean, 2021)	ΔF	df		B (95 % CI)	β	t	R²	ΔR (Dean, 2021)	ΔF	df

1	Gender	−1.11 (−2.30, 0.09)	−0.11	−1.83	0.14	0.14	18.56^*^,#	2233	Gender	−1.44 (−2.64, −0.24)	−0.15	−2.37^*	0.11	0.11	13.89^*^,#	2226
	BMI	0.22 (0.12, 0.33)	0.25	4.15^*^,#					BMI	0.17 (0.06, 0.29)	0.19	3.07^*^,#
2	Min SM	−0.002 (−0.01, 0.003)	−0.06	−0.85	0.20	0.06	8.86^*^,#	2231	# SM	0.14 (−0.06, 0.29)	0.10	1.40	0.18	0.07	9.31^*^,#	2224
	WL	2.54 (1.14, 3.94)	0.22	3.58^*^,#					WL	2.67 (1.27, 4.08)	0.24	3.75^*^,#
3	Min SM × WL	0.01 (0.01, 0.02)	0.22	2.97^*^,#	0.23	0.03	8.79^*^,#	1230	# SM × WL	0.10 (−0.35, 0.55)	0.03	0.44	0.18	0.001	0.19	1223

Step		Frequency of vomiting

		B (95 % CI)	β	t	R²	ΔR (Dean, 2021)	ΔF	df		B (95 % CI)	β	t	R²	ΔR (Dean, 2021)	ΔF	df

1	Gender	−0.22 (−0.78, 0.34)	−0.05	−0.77	0.02	0.02	2.05	2233	Gender	−0.32 (−0.91, 0.26)	−0.07	−1.09	0.02	0.02	1.94	2226
	BMI	0.01 (−0.04, 0.06)	0.03	0.45					BMI	0.02 (−0.04, 0.07)	0.05	0.69
2	Min SM	0.001 (−0.002, 0.003)	0.05	0.63	0.05	0.04	4.37^*	2231	# SM	−0.01 (−0.11, 0.09)	−0.01	−0.17	0.04	0.02	2.41	2224
	WL	0.60 (−0.05, 1.25)	0.12	1.81					WL	0.75 (0.07, 1.44)	0.15	2.16
3	Min SM × WL	0.004 (0.000, 0.01)	0.14	1.79	0.07	0.01	3.20	1230	# SM × WL	0.03 (−0.19, 0.25)	0.02	0.26	0.04	0.000	0.07	1223

Step		Frequency of laxative use

		B (95 % CI)	β	t	R²	ΔR (Dean, 2021)	ΔF	df		B (95 % CI)	β	t	R²	ΔR (Dean, 2021)	ΔF	df

1	Gender	−0.43 (−1.12, 0.25)	−0.08	−1.24	0.03	0.03	4.06^*	2233	Gender	−0.59 (−1.28, 0.10)	−0.11	−1.70	0.05	0.05	6.44^*^,#	2226
	BMI	0.03 (−0.03, 0.09)	0.07	1.09					BMI	0.06 (−0.002, 0.13)	0.13	1.92
2	Min SM	−0.001 (−0.004, 0.002)	−0.06	−0.74	0.07	0.03	4.05^*	2231	# SM	−0.02 (−0.14, 0.10)	−0.02	−0.31	0.08	0.02	2.77	2224
	WL	0.90 (0.09, 1.70)	0.15	2.20^*					WL	0.83 (0.02, 1.64)	0.14	2.03^*
3	Min SM × WL	0.01 (0.002, 0.01)	0.22	2.73^*	0.10	0.03	7.45^*	1230	# SM × WL	0.28 (0.02, 0.54)	0.15	2.10^*	0.10	0.02	4.39^*	1223

Note: B, β and t reflect values from the final regression equation; BMI = body mass index, Min SM = minutes spent daily on social media, # SM = total number of social media accounts, WL = exposure to weight loss content.

p < .05 (Bonferroni adjusted).

p < .003 (Bonferroni adjusted).