The Effect of Very High versus Very Low Sustained Loading on the Lower Back and Knees in Middle Life

Table 2

Background characteristics of study populations (mean ± SD or mean, median and IQR).

Variable	Torah Scholars; 𝑁=20	Soldiers; 𝑁=25	𝑃 value
Age (years)	43.7, 43.0,; 41.5–45.5	43.2, 43.0,; 43.0–43.0	0.9
Weight (kg in 1983)		72.6±5.9
Recalled weight (kg in 1983)	73.0, 73.5,; 70.0–78.0	73.7, 74.0,; 68.0–77.0	0.9
Years of education	15.7, 14.0,; 16.0–18.0	15.9, 16.0,; 16.0–18.0	0.9
Packs years smoking	4.3, 0.2,; 0.0–7.5	3.0, 0.0,; 0.0–1.5	0.26
Alcohol consumption (units/wk)	0.3, 0.0,; 0.0–1.0	2.1, 1.0,; 0.0–2.0	0.01