Me, myself, and my muscles: associations between narcissism and muscle dysmorphia

Figures & data

Table 1. Bivariate Correlation Matrix for all demographics and study measures

Variable	1	2	3	4	5	6	7	8
1. Sex
2. Age	.15**
3. Years at Gym	−.07	.24**
4. Strength training (hrs/week)	−.08	.00	.45**
5. Cardio training (hrs/week)	−.05	.07	.22**	−.01
6. BMI	−.12*	.21**	.11	.20**	−.06
7. NPI	−.20**	−.06	.08	.20**	−.02	.04
8. HSNS	−.00	−.21**	−.09	−.01	−.08	−.06	.11*
9. MDDI	−.32**	−.16**	.14*	.46**	.02	.19**	.14*	.19**

*p < .05; * p < .01.

Sex: 1 = male, 2 = female.

BMI = Body Mass Index; NPI = Narcissistic Personality Inventory; HSNS = Hypersensitivity Narcissism Scale; MDDI = Muscle Dysmorphia Disorder Inventory.

Table 2. Standardized beta coefficients for hierarchical regression model with global MDDI scores as outcome

Variable	Step 1		Step 2
(Intercept)	0.00 [3.24]		0.00 [3.91]
Sex	−0.25 [0.87]**		−0.26 [0.86]**
Age	−0.11 [0.06]*		−0.08 [0.06]
BMI	0.13 [0.12]		0.06 [0.12]
Years at gym	−0.08 [0.29]		−0.07 [0.28]
Strength training (hrs/week)	0.46 [0.41]**		0.46 [0.42]**
Cardio training (hrs/week)	0.03 [0.49]		0.04 [0.48]
Other training (hrs/week)	0.01 [0.46]		0.02 [0.46]
NPI			−0.04 [0.16]
HSNS			0.19 [0.07]**
F-Ratio	17.61**		16.10**
R ^2	.28**		.32**
ΔR^2			.04**

*p < .05; ** p < .01.

Sex: 1 = male, 2 = female.

BMI = Body Mass Index; NPI = Narcissistic Personality Inventory; HSNS = Hypersensitivity Narcissism Scale.

Standard errors in parentheses.