Insomnia among Medical and Paramedical Students in Jordan: Impact on Academic Performance

Table 2

Insomnia, ISI scores, and interpretation.

No.	Variable	Statistics
1	Insomnia
	Present	741 (75.9%)
	Absent	235 (24.1%)
2	ISI scores	11.2 ± 5.2
3	ISI interpretation
	Absence of insomnia (0–7)	235 (24.1%)
	Subthreshold insomnia (8–14)	487 (49.9%)
	Clinical insomnia, moderate to severe (15–28)	254 (26.0%)

Statistics are expressed as mean ± SD for continuous variables and as a frequency for categorical variables. Numbers (proportions) of participants endorsing each response (N = 977). Pearson’s chi-square was used to test the association between categorical variables, p value ≤ 0.05 was considered significant.