Table 1

Baseline characteristics for whole dataset and complete cases (of exclusively no missing covariate data)

Whole datasetComplete casesP valuePercentage complete (%)
n1030437
Age, years (mean [SD])61 (7.6)59 (6.4)<0.001100
Male sex (n [%])471 (45.7)191 (43.7)0.513100
Caucasian ethnicity (n [%])1023 (99.3)430 (98.4)0.171100
Height, cm (mean [SD])169.8 (9.3)169.8 (9.1)0.950100
BMI, kg/m2 (mean [SD])26.7 (4.2)26.4 (4.0)0.274100
Weight (mean [SD])75.5 (14.7)74.8 (14.3)0.386100
Systolic blood pressure, mm Hg (mean [SD])136.4 (18.0)135.2 (17.7)0.25099.9
Diastolic blood pressure, mm Hg (mean [SD])78.7 (9.7)78.7 (9.3)0.99099.9
Heart rate, bpm (mean [SD])70 (11.8)70 (11.4)0.902100
Average household income before tax (n [%])0.72689.3
 Less than £18 000129 (14.0)56 (12.8)
 £18 000 to £30 999270 (29.3)117 (26.8)
 £31 000 to £51 999285 (31.0)139 (31.8)
 £52 000 to £100 000180 (19.6)96 (22.0)
 Greater than £100 00056 (6.1)29 (6.6)
Degree level or professional education (n [%])652 (63.3)290 (66.4)0.290100
Townsend deprivation index (mean [SD])−1.87 (2.68)−1.76 (2.60)0.472100
Smoking status (n [%])0.73198.4
 Never611 (60.3)255 (58.4)
 Previous361 (35.6)161 (36.8)
 Current42 (4.1)21 (4.8)
Regular alcohol use (n [%])446 (43.8)189 (43.2)0.88898.8
Diabetes mellitus (n [%])56 (5.4)23 (5.3)0.993100
Cardiovascular disease (n [%])91 (8.8)24 (5.5)0.038100
Hypertension (n [%])322 (31.3)135 (30.9)0.938100
Antihypertensive use (n [%])237 (23.0)97 (22.2)0.786100
Statin use (n [%])225 (21.8)77 (17.6)0.078100
LVEDV, mL/m2 (mean (SD))145.2 (33.4)145.9 (33.0)0.70798.2
LV mass, g/m2 (mean [SD])89.2 (24.1)88.5 (23.4)0.59598.2
LVEF, % (mean [SD])59.4 (5.9)59.5 (5.6)0.96898.2
Maximal NC/C ratio (mean [SD])1.93 (0.50)1.91 (0.51)0.508100
Total MET-min/week, MET-min/week (median [IQR])2115 (3599)2226 (4061)0.21473.1
Seven-day average acceleration, milligravity (median [IQR])27.56 (13.50)28.41 (14.40)0.16462.6
  • ‘Percentage complete’ refers to the proportion of complete data in our whole dataset per covariate.

  • BMI, body mass index; LV, left ventricular; LVEDV, LV end-diastolic volume; LVEF, LV ejection fraction; NC/C, non-compaction/compaction.