Table 4.

The incidence of insomnia among the studied group of teachers, including the type of personality and the level of perceived stress.

Variable	Insomnia N =204		Non-insomnia N =208		Value of p
	n	%	n	%
Type of personality Type D personality	80	39	45	22	Chi =26.314 df=2<0.001
Intermediate personality	79	39	71	34
Non-type D personality	45	22	92	44
Level of perceived stress					Chi=35.893 df=2<0.001
Low	36	17.6	84	40.4
Moderate	71	34.8	76	36.5
High	97	47.6	48	23.1

p – test χ².