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Table 1 Characteristics of patients with incident diabetes and a matcheda non-exposed cohort

From: Risk of tuberculosis in patients with diabetes: population based cohort study using the UK Clinical Practice Research Datalink

Characteristic Patients with diabetesb Patients without diabetesc
Number = 222,731 Number = 1,218,616
Age at entry in years   
 (Median, IQR) 62.9 (52.5–72.5) 63.6 (53.3–72.9)
Male gender   
 (number, %) 122,594 (55.0) 647,287 (53.1)
Smoking (number, %)   
 Non-smoker 82,856 (37.2) 525,881 (43.2)
 Ex-smoker 93,491 (42.0) 404,929 (33.2)
 Current smoker 42,414 (19.0) 244,247 (20.0)
 Missing 3,970 (1.8) 43,559 (3.6)
Alcohol intake (number, %)   
 Non-drinker 31,232 (14.0) 134,862 (11.1)
 Ex-drinker 12,151 (5.5) 44,158 (3.6)
 Moderate drinker 145,695 (65.4) 793,877 (65.2)
 Heavy drinker 18,843 (8.5) 99,444 (8.2)
 Missing 14,810 (6.7) 146,275 (12.0)
BMI (number, %)   
 <20 4,648 (2.1) 50,404 (4.1)
 20- < 25 29,973 (13.5) 347,150 (28.5)
 25- < 30 70,949 (31.9) 418,421 (34.3)
 ≥30 105,789 (47.5) 242,928 (19.9)
 Unknown 11,372 (5.1) 159,713 (13.1)
Ethnicity (number, %)   
 White 122,507 (55.0) 626,733 (51.4)
 South Asian 5,326 (2.4) 12,979 (1.1)
 Black 2,347 (1.1) 7,979 (0.7)
 Mixed or Other 2,143 (1.0) 8,518 (0.7)
 Missing 90,408 (40.6) 562,407 (46.2)
Index of Multiple Deprivation   
 1 – Least deprived 26,071 (11.7) 164,172 (13.5)
 2 30,191 (13.6) 174,611 (14.3)
 3 27,406 (12.3) 149,262 (12.3)
 4 27,207 (12.2) 136,276 (11.2)
 5 – Most deprived 24,080 (10.8) 113,147 (9.3)
 Missing 87,776 (39.4) 481,148 (39.5)
Mean number of consultations per year   
 1st tertiled (0–6) 16,096 (7.2) 464,352 (38.1)
 2nd tertile (7–12) 73,287 (32.9) 407,155 (33.41)
 3rd tertile (13-maximum) 133,348 (59.9) 347,109 (28.5)
Total number of consultations   
 1st tertiled (1–15) 32,699 (14.7) 444,234 (36.5)
 2nd tertile (16–49) 65,760 (29.5) 411,258 (33.8)
 3rd tertile (50-maximum) 124,272 (55.8) 363,124 (29.8)
Length of follow-up in years   
 (Median, IQR) 4.4 (1.9–7.8) 3.8 (1.6–7.0)
 Total person-years 1,172,829 5,767,599
  1. aPatients with and without diabetes were matched for index date, age +/− 5 years, gender and practice
  2. bDiabetes diagnosis defined as index date and start of follow-up
  3. cPatients without diabetes on matched index date but may become diabetic in follow-up period
  4. dTertiles defined in the overall cohort
  5. BMI body mass index, IQR interquartile range