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Figure 2: Kaplan-Meier analysis showed significant difference in apnea duration tolerance in patients of incentive spirometry group 1 than deep breathing group 2 patients. '*'-Statistically significant (P < 0.05) higher number of patients (33%) censured (passed 300 s or 5 min apnea) in group 1 (IS) than group 2 (DB) (9%) patients.

Figure 2: Kaplan-Meier analysis showed significant difference in apnea duration tolerance in patients of incentive spirometry group 1 than deep breathing group 2 patients. '*'-Statistically significant (P < 0.05) higher number of patients (33%) censured (passed 300 s or 5 min apnea) in group 1 (IS) than group 2 (DB) (9%) patients.