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Table 1 Features of Female Patients With Hypothyroidism (N = 99)

From: Primary hypothyroidism and chronotypes in adult women

Feature No %
Age, y
 22–59 54 54.5
 60–65 45 45.4
BMI
 18.5–25 (Normal) 17 17.2
 25.1–30 (Overweight) 42 42.4
 > 30 (Obese) 40 40.4
Thyrotropin, mIU/L
 < 0.27 14 14.1
 0.27–4.20 73 73.7
 > 4.20 12 12.1
Diabetes
 Yes 23 23.2
 No 76 76.8
Hemoglobin A1c (n = 23)
 ≤ 7% 10 43.5
 > 7% 13 56.6
Levothyroxine dose, mcg
 < 50 3 3
 50–100 62 62.6
 > 100 34 34.3
Workdays per week, no.
 0–2 15 15.2
 3–5 41 41.4
 > 5 43 43.4
Cigarette smoking
 Yes 6 6.1
 No 93 93.9
Alcohol intake
 Yes 17 17.2
 No 82 82.8
Coffee intake, no. of cups daily
 0 16 16.2
 1–3 53 53.5
 > 3 30 30.3
Sleep medication (weekly)
 Yes 26 26.3
 No 73 73.7
Chronotype (reported)
 Early 63 63.6
 Intermediate 24 24.2
 Late 12 12.1
  Median Interquartile ranges
Workdays: time of going to bed 10:45 PM (9PM–11PM)
Workdays: sleep latency, min 40 (5–90)
Workdays: sleep end 6:30 AM (5:30AM–7AM)
Workdays: sleep inertia, min 5 (3–15)
Workdays: light exposure, min 30 (10–120)
Work-free days: time of going to bed 10:30 PM (8PM–10:30PM)
Work-free days: sleep latency, min 30 (5–90)
Work-free days: sleep end 7:05 AM (6AM–8AM)
Work-free days: sleep inertia, min 5 (3–15)
Work-free days: light exposure, min 30 (10–120)
  1. BMI body mass index (calculated as weight in kilograms divided by height in meters squared)