Table 2

Regression coefficients (95% CI) for resting pulse rate (bpm)* on study year (1980–2008), Body Mass Index (BMI) (kg/m2) and height (cm)†

BoysModel 1‡Model 2‡Model 3‡Model 4‡
Year0.07 (0.04 to 0.09)0.06 (0.03 to 0.08)0.07 (0.05 to 0.09)0.06 (0.04 to 0.08)
BMI0.18 (0.09 to 0.27)0.24 (0.14 to 0.33)
Height−0.08 (−0.11 to −0.05)−0.10 (−0.14 to −0.07)
Girls
Year0.04 (0.01 to 0.06)0.03 (0.01 to 0.06)0.04 (0.02 to 0.07)0.04 (0.01 to 0.06)
BMI0.11 (0.03 to 0.20)0.16 (0.07 to 0.24)
Height−0.07 (−0.11 to −0.04)−0.09 (−0.12 to −0.05)
  • *First pulse rate for all studies, for 1970 cohort the reading taken at end of exam was used.

  • †All pulse rate, BMI, and height measures were centred at mean age (10.3 years).

  • ‡All models were fitted to all individual children: Model 1 includes study year; Model 2 includes study year and BMI; Model 3 includes study year and height; Model 4 includes study year, BMI and height.