Table 2. Exercise characteristics after exercise according to thalassemia major and iron deficiency anemia group.
| Characteristics (mean ± SD or median 25th-75th %) | Iron deficiency group (n = 46) | Thalassemia group (n = 56) | p |
| HR Stage 1, bpm | 107 (±11) | 121 (±14) | < 0.001 |
| HR Stage 2, bpm | 121 (±14) | 138 (±16) | < 0.001 |
| HR Stage 3, bpm | 142 (±16) | 159 (±16) | < 0.001 |
| HR Stage 4, bpm | 173 (±16) | 171 (±10) | 0.48 |
| RPP Stage 1 | 146 (±31) | 156 (±31) | 0.10 |
| RPP Stage 2 | 178 (±40) | 187 (±39) | 0.25 |
| RPP Stage 3 | 204 (±28) | 217 (±46) | 0.17 |
| RPP Recovery | 154 (±32) | 141 (±25) | 0.03 |
| Peak HR, bpm | 181 (±15) | 170 (±13) | < 0.001 |
| HR reserve | 111 (±17) | 107 (±11) | 0.29 |
| Chronotropic index | 84 (±11) | 76 (±11) | 0.001 |
| Exercise capacity (METs) | 13.1 (±1.8) | 10.1 (±1.8) | < 0.001 |
| Exercise time, minute | 11.1 (±1.5) | 8.4 (±1.7) | < 0.001 |
| 1-min HRR | 34 (28-51) | 31 (24-36) | 0.004 |
| 2-min HRR | 59 (52-70) | 50 (40.3-61) | 0.002 |
| 3-min HRR | 64 (59-71) | 55 (47.3-68) | 0.003 |
| 4-min HRR | 68 (63-77) | 59 (50.5-70.8) | 0.001 |
| 5-min HRR | 68 (60-79) | 60 (51-72) | 0.002 |
Values are expressed as mean ± standard deviation or median 25th-75th%. p < 0.05 value is significant. HR, heart rate; METs, metabolic equivalents; RPP, rate pressure product; SD, standard deviation. (Rate Pressure Product = Heart Rate * Systolic Blood Pressure), One way analysis of variance, Independent samples t-test, Mann-Whitney U-test.