Table 3.

Risk factors for dysmenorrhoea

	Crude OR	95% CI	P value	Adjusted OR	95% CI	P value
Age (years)
Age >40	4.06	(1.33 to 13.7)	>0.05	4.46	(1.24 to 17.23)	>0.05
Age ≥40	1.00	–		1.00	–
Three shift rotation
Yes	2.15	(1.15 to 3.98)	>0.05	2.07	(1.01 to 4.21)	>0.05
No	1.00	–		1.00	–
Married
No	2.74	(1.75 to 4.30)	<0.001	2.59	(1.57 to 4.28)	<0.001
Yes	1.00	–		1.00	–
Menstruation as a debilitating event
Higher	2.53	(1.63 to 3.95)	<0.001	2.72	(1.67 to 4.52)	<0.001
Lower	1.00	–		1.00	–
Denial of any effect of menstruation
Lower	2.83	(1.83 to 4.46)	<0.001	2.59	(1.61 to 4.23)	<0.001
Higher	1.00	–		1.00	–

Reference group: age ≥40 years, no three shift rotation, unmarried, reduced menstruation as a debilitating event and increased denial of any effect on menstruation.