A survey study of the association between mobile phone use and daytime sleepiness in California high school students

Table 2 Descriptive statistics - categorical variables

Use phone too much?	*Yes*	No
All	71	129
Male	14	48
Female**	57	81
Tried to reduce using phone?	Yes	No
All	34	168
Male	5	59
Female*	29	109
Awakened by your mobile phone at night?	Never	Occasionally	A few times a month	A few times a week	Almost every day
All	108	70	12	10	2
Male	36	24	2	1	1
Female	72	46	10	9	1
Stayed up late to use cell phone?	Never	Occasionally	A few times a month	A few times a week	Almost every day
All	54	72	38	17	20
Male	27	24	8	2	2
Female**	27	48	30	15	18
Expected accessibility?	Never	Now and then, but not daily	Daily, but not all day	All day	Around the clock
All	2	27	104	53	15
Male	2	10	38	9	4
Female*	0	17	66	44	11
Perceive accessibility as stressful?	Not at all stressful	A little bit stressful	Rather stressful	Very stressful
All	99	91	9	2
Male	38	23	2	1
Female	61	68	7	1

ISSN: 1471-2458