Table 7.

Additional spearman correlation

	Energy drink consumption	Headache additional impact	Blurred vision additional impact	Feeling thirsty additional impact	Tired later additional impact	Sleeping difficulty additional impact
Energy drink consumption
Pearson correlation	1	− 0.194	− 0.102	0.327	0.240	− 0.307
Sig. (2-tailed)		0.426	0.678	0.171	0.323	0.200
N	19	19	19	19	19	19
Headache additional impact
Pearson correlation	− 0.194	1	0.130	− 0.309	0.050	− 0.286
Sig. (2-tailed)	0.426		0.595	0.199	0.839	0.236
N	19	19	19	19	19	19
Blurred vision additional impact
Pearson correlation	− 0.102	0.130	1	− 0.259	− 0.224	0.411
Sig. (2-tailed)	0.678	0.595		0.285	0.357	0.081
N	19	19	19	19	19	19
Feeling thirsty additional impact
Pearson correlation	− 0.327	− 0.309	− 0.259	1	− 0.015	− .630**
Sig. (2-tailed)	0.171	0.199	0.285		0.950	0.004
N	19	19	19	19	19	19
Tired later additional impact
Pearson correlation	0.240	0.050	− 0.224	− 0.015	1	− 0.286
Sig. (2-tailed)	0.323	0.839	0.357	0.950		0.236
N	19	19	19	19	19	19
Sleeping difficulty additional impact
Pearson correlation	− 0.307	− 0.286	0.411	− .630**	− 0.286	1
Sig. (2-tailed)	0.200	0.236	0.081	0.004	0.236
N	19	19	19	19	19	19

**Correlation is significant at the 0.01 level (2-tailed)