**Table 2:** Values of Pearson's product moment correlation coefficient (r) between physical parameters (viz, age, height and weight) and lung function measurements and the simple regression equations for the prediction of VC, FVC, FEV_{1}, FEFR_{25% - 75%}, FEFR_{75% - 85%} and PEFR from age, height and weight in the studied groups.

Pulmonary function measurement |
Group |
Physical parameter |
Correlation Coefficient (r) |
Regression equation |
SEE (l) |

VC (l) | Sedentary | H | r = 0.78 | VC = 0.04H - 1.83 | 0.13 |

W | r = 0.64 | VC = 0.03W + 2.38 | 0.17 | ||

Basketball | H | r = 0.86 | VC = 0.03H - 0.08 | 0.09 | |

W | r = 0.69 | VC = 0.02W + 3.57 | 0.12 | ||

Volleyball | H | r = 0.85 | VC = 0.04H - 3.63 | 0.19 | |

W | r = 0.79 | VC = 0.04W + 1.67 | 0.22 | ||

FVC (l) | Sedentary | H | r = 0.82 | FVC = 0.04H - 2.94 | 0.14 |

W | r = 0.88 | FVC = 0.04W + 1.38 | 0.11 | ||

Basketball | H | r = 0.88 | FVC = 0.03H - 0.17 | 0.08 | |

W | r = 0.70 | FVC = 0.02W + 3.52 | 0.12 | ||

Volleyball | H | r = 0.76 | FVC = 0.02H + 0.71 | 0.13 | |

W | r = 0.74 | FVC = 0.02W + 3.24 | 0.13 | ||

FEV_{1} (l) |
Sedentary | H | r = 0.72 | FEV_{1} = 0.03H - 2.44 |
0.16 |

W | r = 0.82 | FEV_{1} = 0.04W + 1.02 |
0.13 | ||

Basketball | H | r = 0.81 | FEV_{1}= 0.02H + 0.89 |
0.07 | |

Volleyball | H | r = 0.85 | FEV_{1}= 0.005H + 3.04 |
0.02 | |

W | r = 0.92 | FEV_{1}=0.005W + 3.56 |
0.02 | ||

FEF_{25% - 75%} (l.min^{-1}) |
Sedentary | H | r = 0.72 | FEF_{25% - 75%} = 10.10H - 1508.82 |
46.44 |

Basketball | H | r = 0.80 | FEF_{25% - 75%} = 2.58H - 250.85 |
11.05 | |

W | r = 0.74 | FEF_{25% - 75%} = 1.85W + 98.51 |
12.44 | ||

Volleyball | H | r = 0.83 | FEF_{25% - 75%} = 1.57H - 82.72 |
7.49 | |

W | r = 0.71 | FEF_{25% - 75%}= 1.31W + 113.62 |
9.35 | ||

FEF_{25% - 75%} (l.min^{-1}) |
Basketball | H | r = 0.74 | FEF_{25% - 75%} = 2.33H - 305.92 |
12.18 |

W | r = 0.68 | FEF_{25% - 75%} = 1.66W + 9.43 |
13.24 | ||

Volleyball | H | r = 0.81 | FEF_{25% - 75%} = 1.64H - 167.96 |
8.23 | |

W | r = 0.81 | FEF_{25% - 75%} = 1.58W + 22.02 |
8.26 | ||

PEFR (l.min^{-1}) |
Sedentary | H | r = 0.66 | PEFR = 5.46H - 303.99 | 29.72 |

Basketball | H | r = 0.87 | PEFR = 3.23H + 90.31 | 10.58 | |

W | r = 0.80 | PEFR = 2.31W + 527.29 | 12.76 | ||

Volleyball | H | r = 0.86 | PEFR = 2.03H + 315.76 | 8.49 | |

W | r = 0.70 | PEFR = 1.59W + 577.27 | 11.93 |

H = Body height, W = Body weight, SEE = Standard error of estimate. All values of correlation coefficient (r) are significant at the level p < 0.001.