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Table 3 Distribution of the variables regarding primary dysmenorrhoea as the outcome

From: Prevalence of chronic pelvic pain and primary dysmenorrhea in women of reproductive age in Ecuador

  N (%) Control Dysmenorrhoea PR CI 95%
  (n = 2,184) (n = 213) inf sup
Age, y       
 < 20 363 (15.1) 324 (14.8) 39 (18.3) 1.21 0.86 1.70
 20–35 1455 (60.7) 1326 (60.7) 129 (60.6) 1.00 1.00 1.00
 > 35 579 (24.2) 534 (24.4) 45 (21.1) 0.88 0.63 1.21
Body mass index, Kg·m−2       
 < 25 1457 (60.8) 1339 (61.3) 118 (55.4) 1.00 1.00 1.00
 25–30 731 (30.5) 663 (30.4) 68 (31.9) 1.15 0.86 1.53
 > 30 209 (8.7) 182 (8.3) 27 (12.7) 1.60 1.08 2.36
Marital status       
 Married/stable union 1486 (62.0) 1358 (62.2) 128 (60.1) 1.00 1.00 1.00
 Single, widow 829 (34.6) 751 (34.4) 78 (36.6) 1.09 0.84 1.43
 Divorced 80 (3.3) 73 (3.4) 7 (3.3) 1.02 0.49 2.10
Educational level       
 Low (< 8 years) 266 (11.1) 247 (11.4) 19 (8.9) 0.75 0.47 1.19
 Intermediate (8–12 years) 1515 (63.4) 1371 (63.0) 144 (67.6) 1.00 1.00 1.00
 High (> 12 years) 609 (25.5) 559 (25.7) 50 (23.5) 0.86 0.64 1.18
Occupation       
 Employee 1019 (42.7) 922 (42.4) 97 (45.5) 1.00 1.00 1.00
 Housewife 301 (12.6) 275 (12.6) 26 (12.2) 0.91 0.60 1.37
 In education 985 (41.3) 899 (41.4) 86 (40.4) 0.92 0.70 1.21
 Unemployed 82 (3.4) 78 (3.6) 4 (1.9) 0.51 0.19 1.36
Remuneration 1121 (46.8) 1020 (46.8) 101 (47.4) 0.98 0.76 1.26
Physical activity 979 (40.9) 889 (40.7) 90 (42.2) 1.06 0.82 1.37
Religious practice 1698 (70.9) 1544(70.7) 154 (72.3) 1.07 0.80 1.43
Smoking 474 (19.8) 414 (19.0) 60 (28.2) 1.59 1.20 2.11
Alcohol use disorder 1358 (56.6) 1227 (56.2) 131 (61.5) 1.22 0.94 1.59
Illicit drug use 131 (5.5) 111 (5.1) 20 (9.4) 1.79 1.17 2.74
Violence victim 565 (23.6) 486 (22.2) 79 (37.1) 1.91 1.47 2.48
Abdominal surgery 668 (27.9) 592 (27.1) 76 (35.7) 1.44 1.11 1.88
Contraceptive use 620 (25.9) 567 (26.0) 53 (24.9) 0.95 0.71 1.28
Abnormal menstruation 431 (18.0) 381 (17.4) 50 (23.5) 1.40 1.04 1.89
Previous sexual intercourse 1909 (79.6) 1727 (79.1) 182 (85.4) 1.50 1.04 2.17
Parity       
 0 1224 (51.1) 1114 (51.0) 110 (51.6) 1.00 1.00 1.00
 1–2 752 (31.4) 675 (30.9) 77 (36.2) 1.08 0.73 1.60
 3 +  411 (17.2) 372 (17.2) 49 (17.0) 1.35 0.88 2.07
Dyspareunia 210 (16.2) 170 (14.6) 40 (30.8) 2.30 1.63 3.24
Cardiovascular disease 142 (5.9) 130 (6.0) 12 (5.6) 0.95 0.54 1.66
Diabetes 33 (1.4) 27 (1.2) 6 (2.8) 2.08 1.00 4.33
Respiratory disease 176 (7.3) 154 (7.0) 22 (10.3) 1.45 0.96 2.20
Cancer 17 (0.7) 17 (0.8) 0 (0.0)
Psychiatric disorder 77 (3.2) 66 (3.0) 11 (5.2) 1.64 0.94 2.88
Migraine/chronic headache 552 (23.0) 479 (21.9) 73 (34.3) 1.51 1.06 2.16
Lombalgia 382 (15.9) 339 (15.5) 43 (20.2) 1.13 0.70 1.82
Irritative urinary symptoms 373 (15.6) 319 (14.6) 54 (25.4) 1.84 1.38 2.46
Constipation 482 (20.1) 443 (20.3) 39 (18.3) 0.89 0.64 1.24
Distension 937 (39.1) 824 (37.7) 113 (53.0) 1.77 1.37 2.29
IBS criteria 283 (11.8) 220 (10.1) 63 (29.6) 3.14 2.40 4.10
Bristol scale       
 Types 1–2 675 (28.2) 612 (28.0) 63 (29.6) 1.05 0.80 1.40
 Types 3–4–5 1650 (68.9) 1503 (68.9) 146 (68.5) 1.00 1.00 1.00
 Types 6–7 71 (3.0) 67 (3.1) 4 (1.9) 0.64 0.24 1.67
Sleep disturbance 654 (27.3) 529 (24.2) 125 (58.7) 2.61 1.86 3.65
SRQ >  = 8 425 (17.7) 352 (16.1) 73 (34.3) 2.30 1.63 3.24
  1. CI confidence interval; PR prevalence ratio; IBS irritable bowel syndrome; SRQ self report questionnaire (used for screening mental disorders)