diff --git a/src/turnbull.rs b/src/turnbull.rs
index eb093db..916e6e3 100644
--- a/src/turnbull.rs
+++ b/src/turnbull.rs
@@ -66,6 +66,7 @@ enum OutputFormat {
 
 #[derive(ValueEnum, Clone)]
 pub enum SEMethod {
+	None,
 	OIM,
 	OIMDropZeros,
 	LikelihoodRatio,
@@ -107,10 +108,8 @@ pub fn main(args: TurnbullArgs) {
 					]);
 				}
 				summary.add_row(row![r->format!("{:.3}", result.failure_intervals.last().unwrap().1), r->"0.00000", "", "", ""]);
-			} else {
+			} else if let Some(survival_prob_ci) = &result.survival_prob_ci {
 				// No standard errors, just print CIs
-				let survival_prob_ci = result.survival_prob_ci.as_ref().unwrap();
-				
 				summary.set_titles(row!["Time", c->"Surv. Prob.", H2c->"(95% CI)"]);
 				summary.add_row(row![r->"0.000", r->"1.00000", "", ""]);
 				for (i, prob) in result.survival_prob.iter().enumerate() {
@@ -122,6 +121,17 @@ pub fn main(args: TurnbullArgs) {
 					]);
 				}
 				summary.add_row(row![r->format!("{:.3}", result.failure_intervals.last().unwrap().1), r->"0.00000", "", ""]);
+			} else {
+				// No standard errors or CIs
+				summary.set_titles(row!["Time", c->"Surv. Prob."]);
+				summary.add_row(row![r->"0.000", r->"1.00000"]);
+				for (i, prob) in result.survival_prob.iter().enumerate() {
+					summary.add_row(row![
+						r->format!("{:.3}", result.failure_intervals[i].1),
+						r->format!("{:.5}", prob),
+					]);
+				}
+				summary.add_row(row![r->format!("{:.3}", result.failure_intervals.last().unwrap().1), r->"0.00000"]);
 			}
 			
 			summary.printstd();
@@ -218,6 +228,7 @@ pub fn fit_turnbull(data_times: Matrix2xX<f64>, progress_bar: ProgressBar, max_i
 	let mut survival_prob_ci = None;
 	
 	match se_method {
+		SEMethod::None => {}
 		SEMethod::OIM => {
 			survival_prob_se = Some(survival_prob_oim_se(&data, &p, zero_tolerance, false));
 		}