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Table 1 Characteristics of PCOS patients and controls

From: Accelerated osteoarthritis in women with polycystic ovary syndrome: a prospective nationwide registry-based cohort study

   PCOS Controls  
   N = 18,923 N = 56,166  
   N % N % p value
Age (years) at first diagnosis, median (Q1–Q3) 29 (24–36) 29 (24-36) 0.523
< 30 years 9592 (51%) 28,621 (51%) 0.985
30 to < 35 years 3756 (20%) 11,160 (20%)  
35 to < 40 years 2497 (13%) 7394 (13%)  
40 to < 45 years 1366 (7%) 4023 (7%)  
45 to < 50 years 848 (4%) 2476 (4%)  
50 to < 55 years 515 (3%) 1496 (3%)  
55 to < 60 years 349 (2%) 996 (2%)  
Comorbidity (Charlson index ≥1) 1204 6.36 2.236 3.98 < 0.001
Cardiometabolic diseases ICD-10 codes      
Obesity E66 2263 11.96 759 1.35 < 0.001
Diabetes E10 to E14 414 2.19 407 0.72 < 0.001
Type 1 diabetes E10 159 0.84 298 0.53 < 0.001
Type 2 diabetes E11 294 1.55 167 0.30 < 0.001
Gestational diabetes O24, P70 285 1.51 211 0.38 < 0.001
Dyslipidaemia E78 101 0.53 100 0.18 < 0.001
Hypertension I109 318 1.68 331 0.59 < 0.001
Cardiovascular disease I20, I50 67 0.35 161 0.29 0.145
Myocardial infarction I21 to I25 34 0.18 114 0.20 0.532
Transient cerebral ischemia G45 25 0.13 46 0.08 0.052
Stroke I63, I64 45 0.24 75 0.23 0.002
Thrombosis, lung embolism I26, O082, I80 to I82 121 0.64 168 0.30 < 0.001
  1. ICD International Classification of Diseases