Question: Is irritable bowel syndrome more common in women with endometriosis?

Context:
CONCLUSIONS: Comorbid pain syndromes, mood conditions and asthma are common in adolescents and young women with endometriosis.
There are many etiologies of pelvic pain that present with symptoms resembling those of endometriosis-associated pelvic pain that are not diagnosable with laparoscopy, such as interstitial cystitis and irritable bowel syndrome.
Often, such patients are labelled with irritable bowel syndrome. 
Irritable bowel syndrome (IBS) is also common in this setting, and it was speculated that the visceral hypersensitivity associated with this condition might be amplifying the symptoms of endometriosis. 
RESULTS: Compared with controls, patients with minimal to mild and moderate to severe endometriosis had a higher prevalence of symptoms consistent with IBS (0% vs 65% and 50%, respectively, p<0.001) with significantly lower mean pain thresholds (39.5 mm Hg (95% CI 36.0 to 43.0) vs 28.1 mm Hg (95% CI 24.5 to 31.6), p=0.001 and 28.8 mm Hg (95% CI 24.9 to 32.6), p=0.002) not explained by differences in rectal compliance. 
Similarly, women with a history of irritable bowel syndrome were twice as likely to develop endometriosis [AOR=1.9, 95% CI (1.03-3.87)].
A weak association between reported family history of endometriosis and history of irritable bowel syndrome and the development of endometriosis was also observed. 
Irritable bowel syndrome and chronic constipation in patients with endometriosis.
Fifteen per cent of the patients with endometriosis also had IBS and 14% of the patients with endometriosis had functional constipation without IBS.
CONCLUSION: In patients with endometriosis, 29% also had IBS or constipation. 
Seventy-six women (21.4%) had previously been diagnosed with irritable bowel syndrome and 79% of them had endometriosis confirmed.
Compared with controls, women with endometriosis had increased risks of abdominopelvic pain (OR 5.2 [95% CI: 4.7-5.7]), dysmenorrhoea (OR 8.1 [95% CI: 7.2-9.3]), menorrhagia (OR 4.0 [95% CI: 3.5-4.5]), subfertility (OR 8.2 [95% CI: 6.9-9.9]), dyspareunia and/or postcoital bleeding (OR 6.8 [95% CI: 5.7-8.2]), and ovarian cysts (OR 7.3 [95% CI: 5.7-9.4]), and of being diagnosed with irritable bowel syndrome (IBS) (OR 1.6 [95% CI: 1.3-1.8]) or pelvic inflammatory disease (OR 3.0 [95% CI: 2.5-3.6]).
Endometriosis may coexist with or be misdiagnosed as pelvic inflammatory disease or IBS.
RESULTS: Compared with the controls, women with endometriosis were 3.5 times more likely to have received a diagnosis of IBS (OR 3.5 [95% CI: 3.1-3.9]). Even after women had been diagnosed with endometriosis, they were still two and a half times more likely to receive a new diagnosis of IBS when compared with the controls (OR 2.5 [95% CI: 2.2-2.8]).
CONCLUSIONS: Women with endometriosis are more likely to be diagnosed with IBS and PID than controls, even after a definitive diagnosis of endometriosis has been reached.
In women, clinical studies suggest that functional pain syndromes such as irritable bowel syndrome, interstitial cystitis, and fibromyalgia, are co-morbid with endometriosis, chronic pelvic pain, and others diseases.
In women, clinical studies suggest that pain syndromes such as irritable bowel syndrome and interstitial cystitis, which are associated with visceral hyperalgesia, are often comorbid with endometriosis and chronic pelvic pain. 
Depression, anxiety, IBS, FM, CFS, and IC were more common in migraine with EM group than in controls.
Intestinal endometriosis can mimic many gastrointestinal diseases, such as irritable bowel syndrome, inflammatory bowel disease, infections and neoplasms.
Endometriosis is often associated with other painful conditions such as irritable bowel syndrome, interstitial cystitis and fibromyalgia. 
CONCLUSIONS: Diagnosis of endometriosis should be considered in women with recurrent monthly abdominal pain and bowel symptoms, especially if accompanied by gynaecologic complaints, even because the significant symptoms overlap with the irritable bowel syndrome (IBS) and makes the differentiation extremely difficult.
Intestinal endometriosis is typically asymptomatic; however, when symptoms occur, they can mimic those of irritable bowel syndrome.
 Similarly, women with a history of irritable bowel syndrome were twice as likely to develop endometriosis [AOR=1.
Irritable bowel syndrome (IBS) is also common in this setting, and it was speculated that the visceral hypersensitivity associated with this condition might be amplifying the symptoms of endometriosis.
Irritable bowel syndrome (IBS) is also common in this setting, and it was speculated that the visceral hypersensitivity associated with this condition might be amplifying the symptoms of endometriosis.

Answer: Yes, irritable bowel syndrome (IBS) is more common in women with endometriosis. It has been shown that 15% of the patients with endometriosis also had IBS. Women with endometriosis are more likely to have received a diagnosis of IBS. Endometriosis may coexist with or be misdiagnosed as IBS.
Exact answer: yes