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Table 2 Anthropometric and spirometric parameters in male and female participants

From: Reference equations for spirometric indices from a sample of the general adult population in Nigeria

Parameters Range Mean SD Median Skewness Kurtosis
Males(N = 358)
 Age (years) 18–65 38.3 14.9 37.0 0.529 −1.038
 Height (cm) 155.0–185.0 170.7 8.0 170.0 −0.140 −1.120
 VC (Liters) 2.71–5.80 4.10 0.81 4.00 0.162 −0.733
 FVC (Liters) 2.42–4.99 3.81 0.73 3.98 −0.297 −1.091
 FEV1 (Liters) 2.10–4.39 3.37 0.67 3.46 −0.213 −1.092
 FEV1/FVC (%) 77.6–95.2 88.4 4.7 89.4 −0.526 −0.621
 FEV3 (Liters) 2.41–4.59 3.69 0.70 3.78 −0.296 −1.273
 FEV6 (Liters) 2.42–4.98 3.81 0.73 3.98 −0.297 −1.091
 MMEF (Liters/sec) 2.65–7.25 4.70 1.23 4.42 0.423 −0.676
 PEFR (Liters/sec) 5.62–12.50 9.29 1.71 9.16 −0.191 −0.575
 MVV (Liters/min) 73.5–212.4 137.7 31.9 139.9 −0.750 −0.281
 FIVC (Liters) 2.11–4.86 3.56 0.68 3.48 −0.161 −0.645
 FIV1 (Liters) 1.92–4.31 3.29 0.63 3.28 −0.206 −0.625
 PIF (Liters/sec) 5.59–10.72 7.86 1.20 7.99 −0.492 −0.322
Females (N = 362)
 Age (years) 18–63 42.5 15.4 42.0 - 0.148 −1.496
 Height (cm) 143.0–172.0 156.8 6.1 158.0 −0.023 0.069
 VC (Liters) 1.64–5.08 2.65 0.72 2.64 1.362 3.218
 FVC (Liters) 1.73–3.25 2.52 0.47 2.67 −0.327 −1.275
 FEV1 (Liters) 1.46–3.00 2.24 0.44 2.25 −0.179 −1.044
 FEV ratio (%) 77.6–98.9 89.5 5.74 89.3 −0.152 −0.410
 FEV3 (Liters) 1.64–3.25 2.45 0.46 2.56 −0.295 −1.171
 FEV6 (Liters) 1.73–3.25 2.52 0.47 2.66 −0.328 −1.278
 MMEF (Liters/sec) 1.96–6.30 3.66 1.10 3.56 0.579 −0.278
 PEFR (Liters/sec) 3.56–8.33 5.91 1.24 5.90 0.183 −0.543
 MVV (Liters/min) 57.6–120.0 89.6 15.2 93.1 −0.126 −0.878
 FIVC (Liters) 1.55–3.01 2.39 0.49 2.62 −0.462 −1.303
 FIV1 (Liters) 1.32–2.68 2.12 0.46 2.38 −0.454 −1.368
 PIF (Liters/sec) 3.05–7.15 5.19 0.94 5.30 −0.315 −0.124
  1. SD standard deviation, VC vital capacity, FVC forced vital capacity, FEV 1 forced expiratory volume in one second, FEV ratio FEV1/FVC%, FEV 3 forced expiratory volume in three seconds, FEV 6 forced expiratory volume in six seconds, PEFR peak expiratory flow rate, MMEF maximal mid expiratory flow, MVV maximal voluntary ventilation, FIVC forced inspiratory vital capacity, FIV 1 forced inspiratory volume in one second, PIF peak inspiratory flow