Table 2  Symptom-related parameters of the study population such as frequency of symptoms, regular use of painkillers and frequency of having to take time off work; results are presented as absolute values and percentages.

Symptom-related parameters	Group 1: endometriosis patients with infertility n = 76	Group 2: endometriosis patients without infertility n = 106	p-value
Frequency of symptoms	59 (77.6%)	96 (90.6%)	0.020
every day	5 (6.6%)	16 (15.1%)
every week	3 (3.9%)	6 (5.7%)
every month	50 (65.8%)	74 (69.8%)
Regular use of painkillers	50 (65.8%)	84 (79.2%)	0.060
every day	3 (3.9%)	8 (7.5%)
every week	4 (5.3%)	8 (7.5%)
every month	43 (56.6%)	68 (64.2%)
Frequency of having to take time off work			0.203
every week	0 (0%)	1 (0.9%)
every month	6 (7.9%)	17 (16.0%)
every year	2 (2.6%)	1 (0.9%)